Luke Pegler (Jasper in All Saints and Daniel PTTR) was in the final episode of All Saints. In Season 1 of PTTR he had dark hair and must have dyed it for this Season, can't remember what colour his hair was in All Saints.
I must have been feeling a little snippy or 'A' retentive the other night, because I picked up on Daniel's hairdo. When he was talking to Rachel in the office his hair was sort of 'scruffy chic' but later when he joined Rachel for coffee it looked like it had been recently washed and blow waved, complete with a stunningly cute rolled fringe. Just a slip up in continuity or did he really go home and freshen up?