VJW
I do find it funny though that the FPP cadets will join to the 320 no problem this year. People with zero hours who'll get the same T&C's as myself (I could be mistaken) and others on joining, are of more 'value' to the company than someone bringing thousands of hours of experience.
I'm afraid if you think previous experience counts for much in your early days in BA you are going to be sadly disappointed, you're seen as just another mouth to feed/number on a list by management once you hit the line. OTOH there's no doubt experience might help down the road if you can get to the interview stage for something such as training (but see my final para). As others have pointed out BA have already invested in the FPPs.
(FWIW back in the day I joined BA as an X,000 hour "trainer" and even 3-4 years later didn't even have the seniority to get an interview for a training position on the fleet I was on....seniority in company really is everything.)