I'm considering applying but noticed there are 2 vacancies out: (Apologies can't post complete link as I have fewer than 8 posts)
1) https ://jobs . ba . com/jobs/vacancy/speedbird-self-sponsored-pathway-with-ato-9004-gatwick-airport/9022/description/
2) https ://careers . ba . com/job/crawley/speedbird-self-sponsored-pathway-post-ir/32612/61617637408
As someone who also hasn't commenced commercial training yet, though has completed ATPL's it would be no.1 I would be applying for. I'm training modular so I think I can apply, provided I finish training in the next 2.5 years 'If training on a modular route, training must be completed within 2.5 years.'
Though I'm not sure if applying to 1, and training via the modular route, you would then need to complete the rest of your commercial training at L3/Skyborne/ Leading edge+ the others they have partnered with, or I am free to pick my own provider e.g. Aeros? If anyone knows the answer it would be appreciated, in the mean time I'll send out a few emails and try find out a little more...