I flew Belfast International to Gatwick yesterday and at around 5pm there was a bit of a queue at security. They had one passenger X-ray machine in use and two machines for checking bags. It felt busier than Gatwick had been at 6am. However often it's difficult to tell. There was however a lot longer wait at BFS for security and those Disney style queues where you go up and down the line inside a taped of area are enough to drive passengers mad.
When the flight was called there was no gate area as such, and no speedy boarding. I can't remember the gate number but it was a set of stairs next to the causeway lounge. Passengers stood on the stairs and when they got to the bottom of the stairs their boarding passes were scanned and they went straight to the plane.
I guess both of these situations cause people to panic a bit and then social distancing goes out the window.