I think its now 20kg standard and 23kg premier and 5kg hand luggage. I'm sure it was slightly higher when we went last summer as we had booked before the changes and were allowed the increase.
When we flew from Bristol last summer we had to stop at Manchester to refuel and change cabin crew. The runway at Bristol is too short to take off fully fuelled. You don't get off the plane though. One thing to bear in mind is that the entertainment system doesn't work until you take off from Manchester but I think it only took about 40/45 minutes to get there. It does make the flight longer but its wonderful coming home to Bristol for the South West rather than having to travel back from Gatwick jetlagged! The flight home was direct.