In the UK, there is no legal requirement to record departure or arrival times - just the duration of the flight. Consequently, if you decide to record times they can be in any time zone you like.
If you wish to comply with the requirements of JAR-FCL, then the times of departure and arrival must be entered in UTC.
The EASA Implementing Rules leave the issue of logging flights to the individual national authorities and so the provisions of the ANO will, presumably, remain law in this area after 2012