Re: Car people!
We've just had the same fault fixed on a 2018 VW Polo
By ACO Motors in Earlswood. Cost £90
They traced the leak with the hose on roof trick, and found it was an odd one with the "B frame(?)" letting water in and ultimately owerflowing
They drilled a couple of holes to let the water drain into another drainage route and it's been good since
Thanks, I'll give them a call should all else fail