If I may wade into the whole expansion at LBA argument with a degree of realism.
Clearly, Thomson have a large, traditional, customer base in Yorkshire. Again, traditionally, they have excellent brand loyalty. However, much the same as Thomas Cook, their failure to keep the brand relevant and their slow reaction to the emergence of competitors has led to a reduction of over 30% in the number of flights they operate over the last 5 years and a loss of almost 5 million customers! Moreover, they have seen a fleet reduction in recent times with an increasing reliance on outside contracting to fulfil their summer programme. There are, to my mind, two ways Thomson could expand at LBA.
1 - They could order new aircraft or charter further operations to increase the offering. In their current situation, this would amount to suicide financially. Their profit/loss figures are not healthy enough to do that AND replace their fleet.
2 - They could move a/c from other bases. But why would they? As long as the operation is financially viable, there is absolutely no point. A lot is made of the Doncaster thing. Thomson's reasons for going there instead of LBA in the first place might be a little suspect but precisely what incentive is there to move from DSA to LBA? Quite aside from that, where would they put the aircraft?
Of course, it could be argued that the based a/c could do more flights and not go off on its W legs but, again, why? That would just mean a contraction elsewhere! It doesn't make sense. I'm afraid to say that, until Thomson's product becomes the product to have again, the likelihood of them expanding AT ALL is unlikely, let alone at LBA. And that is before we talk about the inherent problems of LBA. It is no small feat that the airport management were able to tempt them back in and, as the LBA base is the smallest in the Thomson menagerie, with MAN nearby, if any were to be dropped, it would be LBA.