There has been no UK dealer for Kitfox for some considerable time.
The series 5 and 7 are both approved in the UK, but both have been limited to 1400lbs mauw, not the 1550lbs which US aircraft are said to be good for.
This does somewhat reduce the payload - the 7 with a Rotax weighs in at about 750lbs usually so still pretty useful.
The handling is said to be considerably better than the 4 (let along the earlier ones...)