If you are going to be out of a job then I guess a 737 rating is the one to have! The low cost outfits in Europe are still looking for rated people, but its very uncertain how long that will last.
An Australian friend told me a couple of weeks ago that the 'Grandparent' visa is only applicable to a male grandparent, maybe better speak to the immigration people here in the UK to clarify that, good luck in anycase.