The Britannic League is a domestic competition for mythball clubs located in the island of Great Britain.
>> Running Championship: Season 38Current champions: Kaer Tamesa Londinium (Season 037)
| # | Season | Team |
| 1 | 008 | Excalibur Camelot |
| 2 | 009 | Excalibur Camelot |
| 3 | 010 | Excalibur Camelot |
| 4 | 011 | Excalibur Camelot |
| 5 | 012 | Brigantis Eboracum |
| 6 | 013 | Brigantis Eboracum |
| 7 | 014 | Brigantis Eboracum |
| 8 | 015 | Venta Boudicea |
| 9 | 016 | Excalibur Camelot |
| 10 | 017 | Excalibur Camelot |
| 11 | 018 | Brigantis Eboracum |
| 12 | 019 | Glevum Gloucester |
| 13 | 020 | Excalibur Camelot |
| 14 | 021 | Brigantis Eboracum |
| 15 | 022 | Verulamium |
| 16 | 023 | Verulamium |
| 17 | 024 | Brigantis Eboracum |
| 18 | 025 | Kair Tamesa Londinium |
| 19 | 026 | Durorer Athletic |
| 20 | 027 | Excalibur Camelot |
| 21 | 028 | Glevum Gloucester |
| 22 | 029 | Trinovant Colchester |
| 23 | 030 | Isca Dumnonia |
| 24 | 031 | Excalibur Camelot |
| 25 | 032 | Excalibur Camelot |
| 26 | 033 | Excalibur Camelot |
| 27 | 034 | Kair Tamesa Londinium |
| 28 | 035 | Durorer Athletic |
| 29 | 036 | Excalibur Camelot |
| 30 | 037 | Kair Tamesa Londinium |
| # | Team | Titles |
| 1 | Excalibur Camelot | 12 |
| 2 | Brigantis Eboracum | 6 |
| 3 | Kair Tamesa Londinium | 3 |
| 4 | Glevum Gloucester | 2 |
| 5 | Verulamium | 2 |
| 6 | Durorer Athletic | 2 |
| 7 | Trinovant Colchester | 1 |
| 8 | Venta Boudicea | 1 |
| 9 | Isca Dumnonia | 1 |
| 30 |