Apologies, the details provided in this question are not right, I'm writing it for Phil, who is busy trying to fix it...
Correct details:-
Auxillary belt replaced, not cambelt. Aux belt caused timing to go out when it broke, and problem is trying to re.-time engine. Still wonder about possibility of damage (poss broken camshaft?), but don't want to remove head unless necessary
Phil, January 2009