Latest I heard from the trainers is 22 people will join the 73 between Jan and end of March. 27 people in the hold pool are 737 rated.
I used
Aptitude Test, FREE Example Tests, Online Aptitude Tests, Psychometric Tests, Online Psychometric Tests - AssessmentDay.co.uk for the verbal reasoning. 10 quid and hundreds of practice questions which follow the exact same format as BA.