Just throwing this out there for comments.
My 2011 4/4, has always had issues with the brakes pulling to one side or other. This has been largely eliminated by changing the off side calliper.
BUT she now pulls up straight in the dry. Hands off the steering wheel, however when the road is wet in moderate rain she pulls to the left which is a bit disconcerting on a motorway. I note depending on how wet after the 1st application of the brakes she is a lot better. Please note that the near side calliper has been fully serviced a couple of times. ( new pistons rubbers etc ) I think I know what’s going on but can’t prove it, as the near side wheel is not dragging. What do you morgan knowledgeable people think.
I have experienced exactly this on many cars over the years and it flags itself only after a prolonged drive on A or M ways with no braking at all for say 100 miles, I think it is the marginal throw out of the discs on the pads and after the first subsequent braking cycle the pads centralise themselves imho.