It was tried between 2002-2004 years ago, by a group including Gordon Pill who used to run Thruster Air Services when they were at Ginge. It failed, primarily because the Urban Air engineers (most Cz based) just weren't prepared to provide the quality of airworthiness reports that the UK needed. They were looking at both the Samba and Lambada at the same time I think, but led things with the Lambada through BMAA.
I flew one once from an airfield in Cz that year, but my logbook just says "sortie abandoned due to low cloud" and I don't think I got much out of the 10 minutes airborne. I did an evaluation of the Samba for BMAA the same year, but any records of that will be in an archive at Deddington somewhere; I don't have anything myself.
I have limited time, but all the right skills - shout if you are planning to do this seriously and need some expert help; I enjoy doing the really difficult bits of a project like that.
G