England and Scotland - this suggests you are looking for the bigger landscapes right?
In England you should look at:
Derbyshire Peak District - the Dark Peak is quite dramatic (big millstone grit edges like the mighty Stanage Edge - my favourite) whilst the White Peak is lovely limestone valleys, hills and rivers. It is busy in August given its still school summer holidays here. Places to be near are Bakewell, Buxton, Castleton, Edale.
Lake District - big hills (mountains!) and fantastic lakes. Lots of walking. Again very busy although as with the Peak District if you are taking photographs in the early morning all you will meet are other photographers or sheep.
Westmorland and along Hadrian's Wall - Carlisle to Newcastle.
In Scotland you are spoilt for choice but I would suggest you try the north west (Torridon, Wester Ross) and the islands - particularly Skye (for the Cuillin hills), Mull for wildlife and anything else for peace and quiet. My real favourite is the Ardnamurchan area (see
www.ardnamurchan.com) but please don't tell too many people as its not yet too busy!
Have a look at
www.trekearth.com for more ideas of some areas/regions in the UK.