I live next to New Covent Garden Market and a pair of kestrels raised 2 in a hole on a factory next to Sainsbury’s car park.  When the young fledged they seemed to come straight over to a block of flats were I live and about 1 week after they fledged one was on the balcony upstairs, I got to 2 metres away before it flew off to the next block. Was lucky this year had the kestrels and also a pr of peregrines raised 4 on a BT building near by - this site was on the RSPB site web cam.