They will be Caparo calipers. I've suffered from a sticking pad for ages whenever the car has been wet. Not that easy to dry off the brakes when it is raining! Williams have changed the pads to Mintex, as well as fit Aeroquip hoses and I'm hoping that the new pads don't stick. Luckily my discs were ok at 12,500 miles.
It'll be interesting to see how much RPM charge. EBC green pads are around £35 for full front set and their replacement discs around £120 a pair. I suspect Morgan charge a lot more!