BA Postal League
Annual postal league tournament for clubs. Runs from November to March. Separate leagues for recurves and compounds. Deadline for entries end of September.

Mayflower Archers Tournament Calendar
This is an excellent resource for archers looking for information on UK archery competitions, especially record status shoots.

Virtual Archery League
Indoor postal league competition for individual archers, running from October to March each year. Separate leagues for recurves and compounds. Deadline for entries end of October.