Thanks for the replies...
It was just on rotation, and it seemed to happen before the rear wheels were off the ground, and then continue for about 5 seconds.
I understand the issue of the wheels not stopping on lift, but I would be amazed if they were so far off balance to create such a vibration. It was really severe.
If the vibration was not felt much by the flight crew, then I guess it was not the nose wheel?
Does anyone have a contact for BA to report this to?
JonP