Whilst BA may be seeking to recruit pilots with A320 series on their licence, it is far from the ONLY type BA fly.
Wouldn't it be a good idea to see what the candidate's 'basic' flying skills are like, on the off chance they may wish to try their hand on another type, in the dim and distant future?
On the bright side, anyone flying a 146, RJ100, or similar, probably wouldn't have any trouble flying a 1-11 sim!
If you catch my drift!
Incidentally, I do seem to recall that an element of 'improvement' during the session was taken into account.