For the wcml south, I have come to a lot of crashes especially at the likes of Watford junction and Euston. I hope this can get sorted as it is preventing me for playing it regularly. DTG, could you try and sort this out. I have tried turning the 710 layers, but to confirm it still crashes with them on. Perhaps a reduction in static stock at wembley could be helpful in terms of helping the fps on the route. Everything is alright, and the performance is good, just some areas such as Watford and Euston when they are quiet.
There is a temporary fix for this and that is to save the game near the point where you would expect a crash and then reload the save to clear the memory. I have tried this and it has worked