It is funny because living here, surrounded by the millions of laws and regulations, i know that there is absultely no way that it would get through the TUV Test (MOT). I failed my first one as there was no reflector on my tail tidy.
I do think that it is one rule for the Brits and one for the Germans!
My theory is they build the seat at that really steep angle so that when they wheelie the bike they're sitting level, rather than having to hang on in fear of sliding off the back Do you get my drift