I'd have though they could ensure she never flys again without resorting to engine removal.
I expect there may be few bits BA want back - the radios, for instance, are presumably usable elswhere. But it will be a pity if they strip her and we end up with a shell with perhaps one or two set of cabin seats in, some of the cockpit fittings gone, and daylight shining through from intakes to tail pipes where the engines should be. Just wouldn't be the same as having her in 'operational' (if disabled) condition.
SSD