Our Atom is louder than we expected

[UTH]

Myself, my bro and my Dad have all gone 3 ways on an Atom 3.

We took it to Goodwood last Friday for our first track day in it......my GOD was it awesome. Couldn't stop giggling as I flew around at 130+!

BUT.....the static noise test came in at 100db! It was ok for Goodwood, but that would be too loud for places like Bedford and Brands Hatch!
What can we do? I assumed that buying an Atom meant we didn't need to worry about noise limits, but clearly that's not the case.

Any advice welcome as we're new to the Atom world.