It is indeed an RS2600, the MKII is a genuine Zakspeed one too. MKI's are BDAs and the projects will be twin cammed and raced in the 300k this year. All get used on the Ring regularly.
I don't know about fugly, Robin, they're a bit too non-descript to be anything other than just plain. There wasn't much in the way of beauty in the 70's coming out of England unless it was a sports car, everything was drawn with a ruler!