Bearded Tit
Panurus biarmicus

Also known as the Bearded Reedling, this bird is not a tit, but the only European example of a babbler. These two photos are of juveniles: the first female (dark beak and eye) and the second male (lighter eye and orange beak). They’re not particularly common, but do concentrate in some areas.
 

Bearded Tit  Bearded Tit

1-2: Radipole Lake RSPB reserve, 16/06/2006.