I'm on the same side of the pond as you...just a little farther downrange.
I was going by your profile.
and a LOT of traffic
downrange of the UK at night VFR - I doubt that very much.
I have run them for several hundred hours in a variety of different aircraft and different units...not earlier ones...and have had hundreds of false warnings.
If that is so why would you persevere with an obvioulsy faulty unit that clearly is purely a distraction. If I were you I would send it back and have it replaced under warranty or check to see if there were issues caused by the aircrafts you are operating - you have read the manual that came with it, have you?