I have posted about this a long time ago, but thought I'd post again just in case someone picks it up this time.
The Europe/London timezone doesn't work on the message boards - I think it actually shows the west coast USA time zone instead.
Check your messageboards settings on this page. You can specify your time zone there. It probably does default to Pacific time if they have no other way to determine your actual time zone (as would be the case for most of us when we set up our paizo accounts but haven't ordered anything yet).
Yes I have already and it does state GMT for London which means it should be working.
It also doesn't work for my husband who has the same settings correctly.