Ok it appears Guppy would have played in the Conference and Division 3 with Wycombe. They won promotion in 93-94 and Wikipedia says he left to Newcastle in 94 so can't confirm if he played in Divison 2 with them. Port Vale 94-97 so that's Division 1 and Premiership with Leicester. Just unsure about Division 2.
Obviously FA Cup with all them and he was at Celtic 2001-2004 so would have played in Europe, but would it have been both UEFA Cup and CL?
At least he's retired so technically, he was the wrong answer to the question.