Help! En route home from the south of England to the highlands and coming past Carlisle the engine starts clattering and I lose power I've managed to pull off the motorway somewhere near Carlisle and with the tools I have with me I can see that the crank pulley is loose. It's not the bolt, the whole thing is moving. I'm pretty sure I'm stuffed given it's a bank holiday in England but can anybody give me suggestions of what it might be and who I might call?