Thanks for the clarification 42psi. I believe there was at least one go around because of it.
That was the Monarch for stand 22 ... last arrival as such for the night and there'd been a bit of a gap since the last one landed.
With a fair few lanterns being seen heading our way as it started to make the approach a quick RWY inspection was decided on.
Nothing was actually found - although there were some picked up from the TWY just afterwards.
I've not heard of anyone else experiencing these although I guess there must be more of them in other parts of the world ??