I do nearlly all my birding around Dungeness, Kent. The area has impressive wildlife lists with many plants and moths of national interest. The main areas are the Bird Observatory at Dungeness, the RSPB reserve, Scotney Gravel Pit and Walland Marsh.
The observatory is particularly good for passage migrants including scarcities and the sea watching is excellent at the right times.
The RSPB reserve is a very good place for water birds and is currently holding 15 Smew, 4 Goosander and good numbers of Goldeneye. The new visitor centre has superb views over the main pit. ARC pit just across the road held Gull-billed Tern and Baird's Sandpiper last year. Dengemarsh at the rear of the reserve is a good area for raptors.
Scotney Gravel Pit is another good place for a number of water species (Lesser Scaup in 2004/2005) as well as raptors and barn owl.
Walland MArsh is the area where the wind farm is proposed. Right in the area where a flock of 120+ Bewick's Swans winter every year. Last year there was also a large flock of Bean Geese in the same area. The area is also good for Yelowhammer, Tree Sparrow, Corn Bunting and Thrushes.
Hope this answers your question. I can probably give you more information if needed but the whole area is well worth a visit. The best place to visit for more information is the Dungeness RSPB Reserve.