Military Events:

The War and Peace Show - A huge military history event and a great source of photo’s
The Victory Show - The biggest reenactment show in the North of England. Not to be missed!
Military Odyssey - From vikings to vietnam, this fantastic living history event covers all periods.
Southport Airshow - The biggest airshow in the North West

Military Re-enactment Groups:

All Fronts Re-enactment Association - AFRA is a Re-enactors association supporting all aspects of the hobby.
Rolling Thunder - This vietnam group put on some of the most spectacular displays ever!
Just Ordinary Men - World War 2 British airborn Re-enactment group.
Kompanie 1 - A group of World War 2 German Re-enactors
Kampfgruppe Stahlkrieger - A Larger group of German Re-enactors with a good collection of vehicles
SOSKAN - American civil war group with a huge number of members

Other interesting Military related sites:

WW2 Reenacting - A great source of info on reenacting events, check out the forums too!
World War II Reenactors Magazine - written by reenactors for reenactors, it’s the only essential read for the hobby.
Bovington Tank Museum - Huge collection of military vehicles, they have a working Tiger!

Wildlife:

Birds of Britain - Excellent source of information about bird life
Whale and Dolphin Conservation Society - Sponsor a dolphin to help keep this charity going!
Formby Squirrel Reserve - information about a red squirrels reserve

Photographers:

Pete Asprey - Cows and Dolphins take center stage here with some lovely landscapes too!
Charlie Phillips - The best source for Scottish Dolphin photos!
Phil Royal - Excellent Military photographer who’s work features a lot in classic military vehicle magazine
Daniel Delcroix - Brilliant Re-enacment photos, all done with real period cameras!
Nick Halling - Another re-enactment photographer who is a master of timeless portraits.