I wouldn't worry about TOM pulling out and going to LBA. Firstly they always seem to divert whenever there is bad weather at LBA, they seem to have higher limits than any other airline. I cant remember TOM ever doing a CAT3 into LBA, though I may be wrong here. Secondly would they really go in direct competition with the likes of Jet2 and Ryanair who are starting to do more than just DUB ex LBA these days. Thirdly how many ac are based at DSA and how many spare overnight stands are there at LBA?
IT WON'T HAPPEN!