Recently purchased a 1985 Pan O which I wanted to get fully serviced before using, the previous owner has passed away and his son who was selling it didn't really know much about the history or what work had or hadn't been done.
Tried to arrange a mobile engineer but found it difficult to arrange one.
Finally managed to contact Trevor at Premier Caravan Services in Canterbury. Was very helpful and able to accommodate getting the van serviced on a Saturday. Did an excellent job, made a point of explaining everything he had done including showing us all old the parts he had replaced and why he had done so. Would have no problem recommending them
You can find them here.
http://www.premiercaravanservices.co.uk/