Hi Stuart. Agree in theory, but Fiat dealers hopeless - and proven by Ronnie Stuart with the Thesis. Had to abandon them for proper Alfa dealer.
I have always taken my Lybra to County Motors in Carlisle. They were the Fiat/Alfa dealer and have never made any issue about servicing my Lancias. Despite no longer being linked to any manufacturer, I still take my Lybra to them as they know the car well. I even took the Fulvia to them when they were a main dealer, and they never had any issues working on it. They have also said that looking after my 2009 Delta will be no problem for them either.
I spoke to them about servicing Lancias and they told me that when Lancia pulled out of the UK they decided to take responsiblility for looking after Lancia servicing, in line with Fiats instructions at that time. Unfortunately, newer Fiat/Alfa dealers do not seem to know or understand their responsibilities.
I guess the main problem is finding a good garage that are happy to work on any car and you trust their work, irrespective of make or model. I have taken the Lybra to garages all over the UK during my time in the forces, and I have always been lucky in that I have found garages that are happy to work on the car whether they be Fiat dealers or independent garages.