Bluetit Invasion

This morning we had an invasion of Bluetits again?
  They seem to have a system whereby they visit all the fruit trees in the area and go over them with a fine tooth comb,looking for grubs.And boy do they find some!
  Because it was a little earl and overcast this morning.I used a little flash just to help it. It has of course coloured the catch light in the birds a eye a little?