The following links may be of interest, but if you know of any others which are not listed below, suggestions are welcomed
ArcheryGB The governing body for archery in Great Britain and Northern Ireland.
World Archery The international governing body for archery.
County of Surrey Archery Association
S.C.A.S. The umbrella organisation for archery in the Southern Counties.

Tournament Diary A handy guide to what tournaments are on throughout the year, hosted by Brighton Bowmen.

Archery TV The official YouTube channel of  World Archery.​

Bow International A popular archery magazine
Handicap Calculator Find the handicap of a round with this easy to use calculator
Archers Reference Handy, free guide to archery

A selection of archery shops:
Quicks A local archery shop, near to Hampton Court.
Carol Archery Local supplier of longbows and accessories, in Stoke D'Abernon.
Bowsports
Chiltern Archery 
Perris 
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Videos:
A collection of videos by Alistair Whittingham on bow set-up or shooting technique: YouTube