Heavy Glider:
sorry but your hypothesis is extremely unlikely...
Firstly, most of the pushback tugs used by BA at LGW lift the nosewheel off the ground anyway..also - i can't speak for the airbus..but very few aircraft if any have brake units on the nosegear, therefore lifting the nosewheel would not be a solution to seized brakes.
Lastly, I doubt very much that a BA operating crew could help with info on this "incident" - since BA do not operate Airbuses out of LGW (yet). It would have been a GB Airways aircraft operated by GB Airways crew - they are a franchise - a totally seperate, privately owned company who operate in BA colours and with BA flight numbers..
atb,
bzzzzz