This little guy is living on my patio, flying a bit but not very well. Parents are still feeding him so I'm just leaving well alone but thought it was quite unusual. 
Hi Karen
I can't make out from the pic whether the chick has a pink eyes or not, as that could differentiate between albinism (absence of pigment) and leucism (lack of pigment, much more common)
There's a BTO article HERE about the two conditions, and HERE is a survey they are running about abnormal plumage if you'd like to take part 