How about GB Airways or BA Connect (both British Airways' subsidiaries).I'm not sure if GB is still recruiting for its Manchester base, but BA Connect should be.
Have a look on their respective websites:
http://www.bacitiexpressjobs.com/
(it looks like they are recruiting for Manchester cabin crew - download the application forms and send it off, or you can ring them for more information. All the details are on the website above.)
http://www.gbairways.com/
(only recruiting for Gatwick it seems)
Let us know how you get on!