GB will take 4 A320's in Feb(1)G-TTOB / Mar (2) G-TTOC & D / Apr (1) G-TTOE in 2002.. Allegedly, the plan is to have 19 "Airbus" in service by the end of 2006 - including A319/s to replace the 737-300s. There will be 11 aircraft (4x 737-300 / 5x Airbus A320 / 2x A321) in service at the start of the Summer 2002 season..
It appears also that GB & BA have swapped delivery positions on A320/321s. BA will now take A321 line numbers 1637 & 1671 (from memory) and they will be registered G-M??A for some reason.. Roughly those line numbers should be deliverable next winter.