This is the KNW (also known as the Imperator), built in 1976 using a Hillman Imp as its mechanical base. The TR7 has a lot to answer for!!
Close but not quite a cigar yet..
It is the KNW and it does have an Imp engine but have another look at that name, and don't forget that for the point I need to know the name of its builder plus what the car was actually based on, rather than what engine it used, which is not quite the same thing!
Incidentally the source insists that this car actually pre-dated the TR7, which didn't come out until 1977/8 I believe.
Locked for your reply.