This really is Camelot! Yesterday was baking hot, and then it rained in the night (so I didn't have to water the garden) and today it is sunny again!
There are pigeons nesting in my oak tree. One was sitting there as far back as April, but now it really seems there might be baby pigeons in the offing. I've seen two birds - one sits on the nest and the other flies off to look for food. The pictures below are actually of the two different birds - one has a white ring on the neck, but the other hasn't.
Pigeon without ring round neck.
Pigeon with ring round neck.
So I should be seeing little pigeons (are they called squabs?) soon.