BB FANS

Just curious.
Here is East Northants near Cambridgeshire border there are dozens of Microlights coming over heading in a North-Easterly direction.
I've lost count of the numbers but in the last hour there has been 2 or 3 in the air constantly.

I've looked on the British Microlight Aircraft Association website for events but there aren't any listed in that direction.

There a championship at Sywell ,there's something on on the Warwickshire / Leicestershire border. All in the wrong direction. I was thinking of the East of England Show Ground but it clear today.
Also Duxford is clear.

Trying for find info on the air ,monitoring Sywell Radio now looking for Microlight traffic.

Any ideas where they might be heading ?

Cheers