Found it...
Originally Posted by
adrianjc32
Actually that has changed now. Take the lifts nearest to gate 36 back down to the TTS level and go left, following the signs for A gates. Go down the stairs and take the corridor walking route back to A. At the end there are some lifts that will take you back up to the T5A lounge just by the South Customer Service Desk. I walked it in about three minutes the other day. If you cant manage the walk then you can take the TTS back but you have to pass back through the FCC and North Security again.
(original thread: post 8 in
http://www.flyertalk.com/forum/briti...5-what-do.html)