Well, after another extensive search last Saturday night, I found this post by rcg1 from 20 May 2005 see here which mentioned relay 114. The pics I took, showed this at the lower right of the 2nd level. Dismantled again, removed relay, checked on bench and yes, although it clicks, both contact sets remain open circuit. I took it apart for interest, and one of the contact sets had overheated and melted surrounding plastic, hence jamming it off. For anyone who needs to know, the VW part no. on the relay is 701959141A. Contrary to the post by rcg1, Fords do supply this - my local dealer came up with the number (after a 10 min search). Ford part no. is 7203550 (Air Con Blower Relay) and they ordered it from Ford UK for me. They were slightly cheaper than VW as well.