| | | Club Events | | | | |
| | | chess.com |  | | | |
| 1st June | chess.com | Tuesday Improvers Blitz | https://www.chess.com/tournament/live/ecf-u1600-tuesday-blitz-2358516 | Swiss | 5|2 | β Blitz |
| 3rd June | chess.com | Thursday Afternoon Blitz | https://www.chess.com/tournament/live/ecf-thursday-afternoon-blitz-2356817 | Swiss | 5|2 | β Blitz |
| 3rd June | chess.com | Thursday Improvers Rapid | https://www.chess.com/tournament/live/ecf-u1600-thursday-rapid-2358520 | Swiss | 10|2 | π Rapid |
| 4th June | chess.com | Friday Evening Slow Blitz | https://www.chess.com/tournament/live/arena/ecf-friday-evening-diamond-blitz-1186626 | Arena | 10|0Β | β Blitz |
| 6th June | chess.com | Sunday Evening Rapid | https://www.chess.com/tournament/live/ecf-sunday-evening-rapid-2381749 | Swiss | 10|2 | π Rapid |
| 8th June | chess.com | Tuesday Improvers | https://www.chess.com/tournament/live/ecf-tuesday-improvers-blitz-2381756 | Swiss | 5|2 | β Blitz |
| 10th June | chess.com | Thursday Afternoon Slow Blitz | https://www.chess.com/tournament/live/ecf-thursday-afternoon-blitz-2396027 | Swiss | 5|2 | β Blitz |
| 11th June | chess.com | Friday Evening Slow Blitz | https://www.chess.com/tournament/live/arena/ecf-friday-evening-diamond-blitz-1211404 | Arena | 10|0 | β Blitz |
| 13th June | chess.com | Sunday Evening Rapid | https://www.chess.com/tournament/live/ecf-sunday-evening-rapid-2395990 | Swiss | 15|10 | π Rapid |
| 15th June | chess.com | Tuesday Improvers | https://www.chess.com/tournament/live/ecf-tuesday-improvers-u1600-blitz-2395995 | Β Swiss | Β 5|2 | Β β Blitz |
| 17th June | chess.com | Thursday Afternoon Slow Blitz | | Swiss | 10|2 | π Rapid |
| 18th June | chess.com | Friday Evening Slow Blitz | https://www.chess.com/tournament/live/arena/ecf-friday-evening-diamond-blitz-1224702 | Arena | 10|0 | β Blitz |
| 20th June | chess.com | Sunday Evening Rapid | https://www.chess.com/tournament/live/ecf-sunday-evening-rapid-2411190 | Swiss | 15|10 | π Rapid |
| 22nd June | chess.com | Tuesday Improvers | https://www.chess.com/tournament/live/ecf-tuesday-afternoon-improvers-rapid-2411196 | Β Swiss | 10|2 | π Rapid |
| 24th June | chess.com | Thursday Afternoon Slow Blitz | https://www.chess.com/tournament/live/ecf-thursday-afternoon-blitz-2411197 | Swiss | 5|2 | β Blitz |
| 25th June | chess.com | Friday Evening Slow Blitz | https://www.chess.com/tournament/live/arena/ecf-friday-evening-diamond-blitz-1237521 | Arena | 10|0 | β Blitz |
| 27th June | chess.com | Sunday Evening Rapid | https://www.chess.com/tournament/live/ecf-sunday-evening-rapid-2425561 | Swiss | 10|2 | π Rapid |
| 29th June | chess.com | Tuesday Improvers | https://www.chess.com/tournament/live/tuesday-afternoon-improvers-blitz-2425901 | Β Swiss | 5|2 | β Blitz |
| | | | | | | |
| | | lichess |  | | | |
| 2nd June | lichess | Wednesday Evening Blitz | https://lichess.org/swiss/Zpu2dF5U | Swiss | 3|2 | β Blitz |
| 5th June | lichess | Saturday Evening Slow Blitz | https://lichess.org/tournament/NjnEJNeB | Arena | 10|0 | π Rapid |
| 7th June | lichess | Monday Afternoon Blitz | https://lichess.org/swiss/wQs1q9hK | Swiss | 5|2 | β Blitz |
| 9th June | lichess | Wednesday Evening Blitz | https://lichess.org/swiss/yocoOde7 | Swiss | 3|2 | β Blitz |
| 12th June | lichess | Saturday Evening Rapid | https://lichess.org/tournament/YNwCtul5 | Arena | 10|0 | π Rapid |
| 14th June | lichess | Monday Afternoon Blitz | https://lichess.org/swiss/ABrHO63N | Swiss | 5|2 | β Blitz |
| 16th June | lichess | Wednesday Evening Blitz | https://lichess.org/swiss/D1rqIK5Z | Swiss | 3|2 | β Blitz |
| 19th June | lichess | Saturday Evening Rapid | https://lichess.org/tournament/5IBkmorF | Arena | 10|5 | π Rapid |
| 21st June | lichess | Monday Afternoon Blitz | https://lichess.org/swiss/5Ku5klcT | Swiss | 10|5 | π Rapid |
| 23rd June | lichess | Wednesday Evening Blitz | https://lichess.org/swiss/cdKH318M | Swiss | 3|2 | β Blitz |
| 26th June | lichess | Saturday Evening Slow Blitz | https://lichess.org/tournament/lcZUKh8R | Arena | 10|2 | π Rapid |
| 28th June | lichess | Monday Afternoon Blitz | https://lichess.org/swiss/AUfVxQdT | Swiss | 5|2 | β Blitz |
| 30th June | lichess | Wednesday Evening Blitz | https://lichess.org/swiss/OIuSQayL | Swiss | 3|2 | β Blitz |
| | | Juniors Club |  | | | |
| 3rd June | lichess | 13th Rapid Max Open | | Swiss | 10|5 | π Rapid |
| 3rd June | lichess | 13th Rapid Max U1800 | | Swiss | 10|5 | π Rapid |
| 3rd June | lichess | 13th Rapid Max U1600 | | Swiss | 10|5 | π Rapid |
| 3rd June | lichess | 13th Rapid Max U1400 | | Swiss | 10|5 | π Rapid |
| 10th June | lichess | 9th Blitz Max Open | | Swiss | 3|2 | β Blitz |
| 10th June | lichess | 9th Blitz Max U1800 | | Swiss | 3|2 | β Blitz |
| 10th June | lichess | 9th Blitz Max U1600 | | Swiss | 3|2 | β Blitz |
| 10th June | lichess | 9th Blitz Max U1400 | | Swiss | 3|2 | β Blitz |
| 17th June | lichess | 2nd Superblitz Swiss | | Swiss | 3|0 | β Blitz |
| 24th June | lichess | 14th Rapid Max Open | | Swiss | 10|5 | π Rapid |
| 24th June | lichess | 14th Rapid Max U1800 | | Swiss | 10|5 | π Rapid |
| 24th June | lichess | 14th Rapid Max U1400 | | Swiss | 10|5 | π Rapid |
| | | Juniors Masters |  | | | |
| 13/06/2021 | lichess | Summer Cup Qualifier 13th June Under 7 | | Swiss | 10|5 | π Rapid |
| 13/06/2021 | lichess | Summer Cup Qualifier 13th June Under 9 | | Swiss | 10|5 | π Rapid |
| 13/06/2021 | lichess | Summer Cup Qualifier 13th June Under 11 | | Swiss | 10|5 | π Rapid |
| 13/06/2021 | lichess | Summer Cup Qualifier 13th June Under 13 | | Swiss | 10|5 | π Rapid |
| | | | | | |
| 27/06/2021 | lichess | Summer Cup Final 27th June Under 7 | | Swiss | 10|5 | π Rapid |
| 27/06/2021 | lichess | Summer Cup Final 27th June Under 9 | | Swiss | 10|5 | π Rapid |
| 27/06/2021 | lichess | Summer Cup Final 27th June Under 11 | | Swiss | 10|5 | π Rapid |
| 27/06/2021 | lichess | Summer Cup Final 27th June Under 13 | | Swiss | 10|5 | π Rapid |
| 27/06/2021 | lichess | Summer Cup Final 27th June Under 18 | | Swiss | 10|5 | π Rapid |
| | | Cornwall | | | | |
| 15 June – 22 June | lichess | 1st Cornwall Online Summer Congress | https://ecflms.org.uk/lms/node/68979/rounds | Individual Challenge | 45|15 | π’ Standard |
| | | Ealing | | | | |
| 01 – 21 June | lichess | Spring Tournament Open | https://ecflms.org.uk/lms/node/67079/rounds | Individual Challenge | 45|15 | π’ Standard |
| 06 – 24 June | lichess | Spring Tournament U1550 | https://ecflms.org.uk/lms/node/67089/rounds | Individual Challenge | 45|15 | π’ Standard |
| 28 – 30 June | lichess | Spring Tournament NG | https://ecflms.org.uk/lms/node/67101/rounds | Individual Challenge | 45|15 | π’ Standard |
| | | Counties | | | | |
| June | lichess | Open | https://ecflms.org.uk/lms/node/60070/home | Platform | 90|30 | π’ Standard |
| June | lichess | Minor | https://ecflms.org.uk/lms/node/60070/home | Platform | 90|30 | π’ Standard |
| June | lichess | U1800 | https://ecflms.org.uk/lms/node/60070/home | Platform | 90|30 | π’ Standard |
| | | Essex | | | | |
| June | lichess | Essex OL Open Championship – LIVE | https://ecflms.org.uk/lms/node/66963/rounds | Challenge | 60|15 | π’ Standard |
| June | lichess | Essex OL U1800 Championship – LIVE | https://ecflms.org.uk/lms/node/67108/rounds | Challenge | 60|15 | π’ Standard |
| June | lichess | Essex OL U1500 Championship – LIVE | https://ecflms.org.uk/lms/node/67109/rounds | Challenge | 60|15 | π’ Standard |
| June | lichess | 4NCL Congress | | | | |
| June | lichess | 4NCL Congress Open | https://www.4ncl.co.uk/ | Challenge | 90|30 | π’ Standard |
| June | lichess | 4NCL Congress 2000 | https://www.4ncl.co.uk/ | Challenge | 90|30 | π’ Standard |
| June | lichess | 4NCL Congress U1700 | https://www.4ncl.co.uk/ | Challenge | 90|30 | π’ Standard |
| June | lichess | 4NCL Congress U1400 | https://www.4ncl.co.uk/ | Challenge | 90|30 | π’ Standard |
| June | lichess | 4NCL Congress U1100 | https://www.4ncl.co.uk/ | Challenge | 90|30 | π’ Standard |
| | | Grand Prix | | | | |
| June | lichess | June Blitz | https://lichess.org/tournament/Y56zADBm | Platform | 3|2 | β Blitz |
| June | lichess | June Rapid | https://lichess.org/swiss/PYDWnQt2 | Platform | 10|5 | π Rapid |
| | | Guildford | | | | |
| June | lichess | Guildford Internal | | | 90|30 | π’ Standard |
| June | lichess | Guildford Internal | | | 90|30 | π’ Standard |
| | | Heaton | | | | |
| June | lichess | Heaton Cup | https://ecflms.org.uk/lms/node/68873/home | | 90|30 | π’ Standard |
| June | Tornelo | Hampstead Congress | | | | |
| June | Tornelo | Hampstead Congress Open | https://tornelo.com/chess/orgs/chess-england/ | Platform | 90|30 | π’ Standard |
| | lichess.org | Hertford | | | | |
| June | lichess.org | Hertford Club Internal | https://ecflms.org.uk/lms/node/66882/rounds | Challenge | 90|30 | π’ Standard |
| | | Hillingdon | | | | |
| June | lichess | Hillingdon District League Spring Swiss | https://ecflms.org.uk/lms/node/65173/efixtures | Challenge | 90|30 | π’ Standard |
| | | Iceni Live League | | | | |
| June | | Iceni Live Classic 5 Open | https://ecflms.org.uk/lms/node/67103/rounds | Challenge | 90|30 | π’ Standard |
| June | | Iceni Live Classic 5 Challengers | https://ecflms.org.uk/lms/node/67104/rounds | Challenge | 90|30 | π’ Standard |
| | | Manchester | | | | |
| June | lichess.org | Manchester Supporters | https://ecflms.org.uk/lms/node/64579/home | Platform | 10|5 | π Rapid |
| June | lichess.org | Manchester Supporters | https://ecflms.org.uk/lms/node/64579/home | Platform | 10|5 | π Rapid |
| June | lichess.org | Manchester Supporters | https://ecflms.org.uk/lms/node/64579/home | Platform | 10|5 | π Rapid |
| June | lichess.org | Manchester Supporters | https://ecflms.org.uk/lms/node/64579/home | Platform | 10|5 | π Rapid |
| | | North East | | | | |
| June | lichess.org | Division 1 | http://ecflms.org.uk/lms/node/64912/efixtures | Challenge | 45|15 | π’ Standard |
| June | lichess.org | Division 2 | http://ecflms.org.uk/lms/node/64919/efixtures | Challenge | 45|15 | π’ Standard |
| June | lichess.org | Division 3 | http://ecflms.org.uk/lms/node/64926/efixtures | Challenge | 45|15 | π’ Standard |
| June | lichess.org | Division 4 | http://ecflms.org.uk/lms/node/65243/efixtures | Challenge | 45|15 | π’ Standard |
| | Shrewsbury | | | | |
| June | lichess.org | | https://www.shropshirechess.org/announcements/shrewsbury-town-championships/ | Challenge | 45|15 | π’ Standard |
| | | Shropshire | | | | |
| June | lichess.org | Shropshire Individual Championship | https://www.shropshirechess.org/Nick/Shropchamps.htm | Challenge | 45|15 | π’ Standard |
| June | lichess.org | Shropshire Minor Individual Championship | http://www.newportchessclub.com/shropshire/shropshire-minorindividual/ | Challenge | 45|15 | π’ Standard |
| June | lichess.org | Shropshire Cox Trophy | http://www.newportchessclub.com/shropshire/shropshire-minorindividual/ | Challenge | 45|15 | π’ Standard |
| | | | | | | |
| | | Thames Valley | | | | |
| June | lichess.org | Thames Valley Div 1 | https://ecflms.org.uk/lms/node/67127/efixtures | Challenge | 45|15 | π’ Standard |
| June | lichess.org | Thames Valley Div 2 | https://ecflms.org.uk/lms/node/67250/efixtures | Challenge | 45|15 | π’ Standard |
| June | lichess.org | Thames Valley Next Gen | https://ecflms.org.uk/lms/node/67168/efixtures | Challenge | 45|15 | π’ Standard |
| | | Uxbridge | | | | |
| June | lichess.org | Uxbridge Online Rapid Champs | https://ecflms.org.uk/lms/node/64801/rounds | Challenge | 10|5 | π’ Standard |
| June | lichess.org | Uxbridge Online Champs | https://ecflms.org.uk/lms/node/64801/rounds | Challenge | 90|30 | π’ Standard |
| | | Wanstead | | | | |
| June | lichess.org | OL Classical 2 in 1 Snakes & Ladder Arena R1 | https://ecflms.org.uk/lms/node/67453/rounds | Challenge | 45|15 | π’ Standard |