Yesterday PRA to LHR we were all at the gate and two gentlemen started to queue, we lined up alongside them in a second queue (there were two podiums) when two ladies came forward to “ask” the desk something and then promptly stood in front of the two men. They then called for pre-boarding and we moved forward (I was in a wheelchair), and so did the two ladies. whilst we were processed I overheard an interesting conversation. First they were asked if they had additional needs, then they were asked if they were with us - at which point I said no I was only travelling with my husband the last thing I heard as I moved off was them being asked why they had come forward! We had time to get to the plane, dismantle and fold the wheelchair, board and stow our things before they finally appeared so obviously the gate agent didn’t think they needed priority boarding!