Those twelve places were:
The only three still standing are the ones at Waltham, Northampton, and Geddington. The one in Charing Cross is a copy of the original.
... Patrese, (Italy) 1983 - Keke Rosberg, (Finland) 1984 - Alain Prost, (France) 1985 - Alain Prost, (France) 1986 - Alain Prost, (France) 1987 - Ayrton Senna, ...