All you need to tell them is that due to a volcanic ash cloud, it has been decided that airspace is closed until further notice, and this is being done for the safety of travellers. It's a saftey issue, surely that's all they need to know? Tell them to check the NATS website if they want more details, even though its just crashed due to everyone logging in!
It's not your fault, not your problem, and it's all part and parcel of air travel, ie 'Time to spare? Go by air' !!!
Wonder if North Sea pilots will get the day off?
