i too have an avondale,and i bought a van at earls court last year(bad move)from glossop caravans.having an avondale dealer about 12 miles away i thought i would be able to get it serviced there,and would not have to travel 300 ml round trip to glossop and back for a sevice or if anything went wrong with the van.
unfortunately i was wrong,local avondale dealer would not service it,and said that even if he were to negotiate with glossop to sevice the van i would always be last in line as his customers would always come first.i also contacted avondale all they said was i should take it back to the dealer i purchased it from but if glossop were to allow me to get it serviced from local avondale dealer they would be ok with that.as far as warranty work local dealer said definately not i would have to go back to glossop.unfortunately something did go wrong with the van,shower doors warped and had to get them replaced,also the service had to travel there too,you can always ask but i think the response could be the same as i got.