Garden Wildlife UK

Hello,
Can anyone determine whether the insects shown in the photo are bees or wasps (apologies for the poor resolution of the picture)? Previously, we've had sparrows, blue tits and bees in the bird box. Last year there was nothing. The current occupants look more like wasps, but I'm not certain.
Thanks, Chris. Edit: here's a close up of the same photo:

Look like wasps to me Chris but might be best waiting for others thoughts

Definitely looks like Wasps, we have some in a nest box too

Tanks Linda and Scozmos for the opinions. It confirms what I suspected. I'll see how the situation develops. Hopefully they'll abandon the box after a few weeks.

Definitely Wasps I would say. If you decide to let them stay you will have them until the end of September.