But it says at the bottom of all screens that "All times are GMT"
Is the UK in GMT now? I can never remember! When I was in the Navy

GMT was "Z" or "Zulu" time which I think was winter time. Summer time was then Alpha time as you traveled east you went through Bravo, Charlie time etc - the furthest I got was Golf time in Japan. But the Navy being the Navy, you had to keep two times, Zulu time was the official time and the local time was say Delta time (In the Gulf for example).
It meant that the whole of the Navy worldwide kept the same time - Zulu time. Damn confusing though - we had two clocks in the office on with a big red Z painted on the face and another that we changed every time we crossed a timezone. Even more confusing was the way the time was written. It's twenty past 8 at night (Alpha time!) on the 11th now which was written as 111920Z4 which read as 11th day:1920 Zulu time and the 4 was a checksum - add all the numbers up = 14 but you only used one digit, so 4 was added after the Z.
So given that this is a very international forum, I suppose it makes sense for all posts to be in GMT?