According to
Flight, Thomas Cook will be operating a 'surge' Voyager under 'damp lease' from AirTanker from May 2015. That's a Voyager KC2, not just a standard A330. It will be put back into transport configuration, but with a grockle-fit 323 seat cabin and will be painted in Thomas Cook's colours, rather than the normal John Major grey. See:
Thomas Cook to lease A330 from AirTanker - 6/24/2014 - Flight Global
Part of the deal includes 10 Thomas Cook pilots being 'seconded' to AirTanker to 'assist' with ATr's schedules to the South Atlantic.
ATr consider that the risk of MoD putting its 90-day recall requirement for surge aircraft into effect to be 'low'...... I recall that we had an MoD briefing about this graduated TTW requirement; when I queried this flight of fancy by reminding the speaker that, for every single recent war they've wanted 100% of the tankers on Day One, there was a shuffling of feet and rapid change of subject.....