Over the weekend the website server appears to have gone through an update that caused a hard crash or reboot. This then resulted in a small number of database tables being corrupted and these are/were critical to the functionality of the checkout part of the store.This wasn't spotted until early Monday 13th Jan' due to birthday celebrations.The issue has since been resolved and we're looking at ways to make a repeat of this problem easier to detect and resolve in future.Apologies for the frustration and inconvenience caused and thankyou to those customers who let us know there was a problem.