Another thought
Some people are saying that Kool Klassics in Sussex have recently been appointed as an approved Eriba workshop, though their website isn't definitive about that and they don't appear on the Eriba/Hymer dealership locator web pages.
I'm thinking that if KK are appointed, then Hymer may have, or be considering, a similar deal with Dom Fox. So it may be worth giving him a ring to see.