Admittedly this is rather cheating as far as UK nature goes, but I couldn't not post this picture of an imperious male lion taken at Whipsnade Zoo. They tend to loll around by the floor to ceiling glass of the viewing area, hence availing themselves of good close up photos. That is assuming you can find a clean enough bit of glass to put your lens up against.
How do they keep their fur so clean when presumably they nosh down on bloody meat? I suppose they bathe in a pool and lick themselves clean but I'm still rather surprised.