I’d imagine that your RAC cover would allow you to be taken to a garage of your choice but you’d really need to check with them, but by what you’ve described I’d hazard a guess and say that they would. I’d imagine MINI wouldn’t help as there is multiple reasons as to why there is suspension issues. You could obviously try an independent garage, we’ve used B&M Centre, located in Yoker with always great results, they are also forum sponsors offering 10%off their hourly rate for NMS members