What would the original dealer gain by telling him 'no' though? Dealers surely make a lot of money from Audi UK by undertaking warranty jobs. They lost a customer and the money Audi would have paid them to do the warranty repair.
No one dealer is the same. The people there act the way they do for a variety of reasons and this varies from being nice to being a complete and untter ....
I've found a different dealer where I travel out who are well worth it compared to the local Audi, same dealerships just better staff.