08-12-14, 01:04 PM
Try just ringing up your insurance company and ask them? It shouldn't really be an issue - they've both got full US licenses which are good to use in the UK, so all they need to do it bring a proof of their insurance?
Either that, or get them to ring their insurance company and enquire if it covers them driving other vehicles, specifically in the UK?
Either that, or get them to ring their insurance company and enquire if it covers them driving other vehicles, specifically in the UK?