Not much to report either from Aberaeron yesterday(single Wheatear) or Llanrhystud today(single Wheatear and a small flock of Golden Plovers). Strangely, I also saw a single Wheatear on the way home today very close to where I live, in Betws Bledrws,which because of the location seemed so much more exciting than the other two.
Regarding Sparrowhawks Ithink the answer is yes they do get stuck in to the bush like that quite often. I was watching Autumnwatch on the telly last Friday and Chris Packham was describing exactly the kind of behaviour that you described. However, I don't know much about these things myself so I may be wrong.