Yep I'm Maltese too, did my PPL at malta school of flying.
I met Dena last week, and she told me that the ATPL groundschool starts in June, and October. I suppose Jetline commencing dates are earlier as you'd have to do your PPL before ground school.
I wouldn't worry too much about doing your PPL in the same place as your other training, at least I wouldnt base my decision on doing the Jetline course solely on that.
Us Maltesers have a reputation for going to BCFT since the school I did my PPL at have links with them. Apparently not too many of us go up there beforehand and explore what else is on offer.
Might be a good idea to try visit at the end of April to incorporate the Flyer exhibition in London.