A MAJOR CORRECTION:The house behind doesn't look British, hence was it built in Britain?
It was built in Britain.
My apologies! I mixed up different puzzle cars. This car was NOT built in Britain and (to my current knowledge) contains no British components other than those mentioned below:
Is it based on a Ford?
No
I've decided to add to this response as well. While not based on a Ford, the car likely contained some British Ford parts when new, and was then modified with additional British Ford component(s) at a later date.