Why not call AL and ask them if they have an Isle-of-Wight based service contact, or contact Reich direct and ask them the same question. I'm sure they will have someone nearby who they can refer you to. By their very nature caravaners travel and shouldn't be expected to return to the point of sale for a possible manufacturing fault.
My Honda mower purchased Southampton Feb 2014 has developed a fault and although I have it serviced, it's not by a Honda agent. When I called Honda today, they traced the record of my purchase and told me to take it to my local Honda dealer (Norfolk) where it will be repaired under warranty.
Something else,.........The Noisiest Wheel Gets The Most Oil.
B