Thanks eveyone :) Sent the series of photos to a Hamburg breeder that also breeds citron spangled Hamburgs and they assure me that these are Hamburgs and that the citron colour has been perfected by crossing generation after generation of silvers to golds. They are more commonly found (although still very rare) in the citron spangle version but the same has been applied to the pencilled by one breeder in the UK.
The cock should develop much more feather covering his whole body will be sure to share piccies when he does eventually reach maturity :)
Apparently the head pic shows the typical charcteristics of the Hamburg ? Off to see if I can find a Hamburg breed list on here....
Edited by cluckadoddledoo - 7/29/12 at 3:24pm