as for your locale, try Thamesmead, particularly Crossness NR and sewage outfall or maybe thrash along the Thames foreshore between Swanscombe and Dartford (winter is good) ... tidal, lots of scrub, mudflats ... Diver possible, waders (Swanscombe reliable for Jack Snipe), wildfowl, Stonechat, Rock Pipit (Water Pipit possible), chance of Black Redstart, Peregrine, Merlin, SE Owl ... as for woodland, Abbey Wood holds LS Woodpeckers