I have the usual problem of being unable to enlarge the images but 1 is clearly a Common Whitethroat & the behviour sums it up well. 2 Dunnock 3 looks like a Linnet from what I can make out & 4 I would say Chiffchaff.
Thanks, Aeshna! I need to make more of an effort to remember them... we don't get over to Stanmore very often, and I tend to forget them between visits. The Whitethroats' behaviour and the way they fly is especially distinctive. I must try harder.