Just to be technical - is it midnight GMT you are using (which does not change at all throughout the year) or is it midnight UK time - which does change. We are on GMT at the moment but go to BST (British Summer Time) on 25th March.

Sorry - you can tell I am an engineer by profession - I tend to try to be precise. Plus people calling UK time GMT tends to be one of my little bugbears as it is not factually correct - GMT never changes - our time does. It is something that cause fun with my MMO gaming where people tend to get confused about times frequently.