I believe its correct name is an air idle speed actuator, and the part no. is A0001412225, which is common to all 103 engines, as well as the four cyl. 102s.
I'm in Bournemouth. Ironically, I have a cousin who lives in Shabbington (Bucks) coming down for a business meeting in the morning, and I'm seeing him after. If only we could move that quick, but I don't know his full itinerary anyway!