Is it just me (I do hope so) or have there been very, very few song birds this summer? We live just off Clapham Common West Side, and have seen plenty of magpies, but hardly any sparrows, blackbirds, robins, tits, finches etc.
I think they get drowned out by the parakeets! In the summer if I was awake at about 3am I often heard the birds singing but by daybreak all I could hear was the screech of the parakeets. Have you tried putting some bird seed out to see what turns up?