In descending order of sitings, from here in South Wales.
Kites - spotted sometimes when commuting (that's me, not the birds) depending on route, very frequently on weekend rides north and west. Sometimes in large numbers if I'm passing one of the numerous red kite feeding stations at the right time.
Buzzards - not unusual on commutes, not unusual on weekend rides, but rarely more than one or two.
Peregrines - they nest atop my office but I don't think I've seen them this year
Kestrels. I don't remember ever seeing them round here though they were top of the list when I grew up in Lincolnshire.
The buzzards are crafty. They stay sitting on posts if you don't get too near, even if you stop, then fly off just as you get the camera out but before you're ready to take the photograph. I do like the un-bird-like noises they sometimes make. Just in the breeding season (their's not mine), maybe.
I've seen a sparrowhawk twice. Once swooping through the back garden, and once on the back of a garden chair in the back garden, tugging with its beak at something bloody between its talons.