In order to ensure you have the correct time stamp on your posts; whenever the clocks change, you need to edit your Profile ("Profile" link near the top of the page) to the new time zone.
Scroll down to "Timezone", & set it the new value in there:
- When the clocks go back in October, set "Timezone" to "GMT".
- When the clocks go forward in March, set "Timezone" to "GMT+1"
Martin