Main dealers, when I bought the car in December.
The thing is, that soon after I bought the car I was looking through all the service print outs and noticed that the service they did just before I bought the car said there was very uneven wear between the two rear sets of pads. 2mm/7mm iirc. They only replaced the discs and pads. The service sheet stated possible caliper fault, but they didn't replace it. I contacted their service department and they said that 'calipers were within tolerance.'
I'm just being very aware, that the further it gets from me having purchased the car, the harder it'll be to get them to replace it if it is faulty.