Recently used this person to service our Troll. He came out and completed the service which took 6 hours including to fit replacement brake shoes. He performed the usual checks and lubes to my satisfaction.
Would recommend him if you require a service in the southwest. He is based in Penzance so not sure what distance he is prepared to travel but he does work with Tavistock Caravans.
Name is Peter Cook (no i'm not Dudley) and can be contacted via https://www.facebook.com/thecaravanmancornwall/
The usual applies just a satisfied customer

Mike