before moving to ED 5 yrs ago I lived in SW9 and we had all the usual garden birds: Bluetits, great tits, wrens, a robin, blackbirds, starlings, greenfinches, chaffinches and even a jay but no sparrows, none at all, ever. Pleased to see sparrows visiting in ED and wonder where the cut-off point is as there seem to be fewer the closer to central London one gets.