I have a BQ Avalon version of this fire. The bulbs are accessed from the front of the fire.
1) Remove the metal surround which is held on by magnets.
2) Remove the two small top screws at either end of the grill above the glass. This keeps the glass in place.
3) Press the glass gently, then slacken the lower two screws of the grill and slide the grill upwards while still holding the glass. Remove the glass sheet.
4) Remove the top and bottom screws from the upright metal strips , attached to the back board, on left and right hand side.
5) Gently ease the logs/coals up. Mine was quite fitting but I could gently rotate it upwards.
6) You can now access the bulbs. Mine were E14 11W coil long life bulbs.
7) Refit in reverse order. Good luck.
Jellybean
January 2015