Bradair isn't an agency, he's a training provider so will be there with a sales pitch.
The last time I attended a BALPA employment seminar which was about 8 years ago, all the airlines that attended and made presentations told us all about how many pilots they had taken for the coming year, and that recruitment was now closed, but be sure to keep an eye on Flight International for future recruitment. It was a bit of a waste of time.
It may be different nowadays.