On Sunday, October 30 at 2am, the UK will revert to Greenwich Mean Time (GMT) by going back one hour, to 1am. This marks the official end of British summertime (BST).
Most European countries will make the same time shift at the same time. Afaik Iceland, Belarus, Turkey and Russia are exceptions.
Times for Sunday bookings are therefore in GMT not, as previously, BST.
For comparison the #WMT Grand Final will be held at
19:30 GMT (click for countdown) which without the clock change would have been 20:30 BST.