According to Carles Bosch and Alain Barbou, this Imp has been in the 1966 Monte Carlo rally. It was driven by Bolton/ Smith and had competition number 92.
The snapshot shows it working as a service car in the RAC rally. The sticker on the bootlid says: 'RAC international rally service'.
The round insurance badge on the windscreen says Nov. 66.
Is that a roof rack? The reflection on the bootlid shows there is something on the roof - or otherwise above it.
The Imp Site
Results of the Works Imps