Only tangentially related, but the last thing I read about the EU Parliament made it sound like the multiple euroskeptic groups thing is essentially because of British people being embarassed to be right wing -- the EFDD being formed because UKIP didn't want to be in the same grouping as France's National Front etc.*, and ECR being formed because the UK Tories didn't want to be in the same grouping as UKIP.

(* Hooking up with 5Stars and basically no one else to do it -- an ideologically incoherent bloc if there ever was one!)

Of course, like any attempt to render EU politics into human language, probably an oversimplification.