I've done a fair few MSE trackdays (15+ including Lyneham), and they definitely aren't lax when it comes to noise testing, they are very well run and organised days. I've signed the petition but it doesn't look hopeful unfortunately. I know the airfield days aren't 'proper' trackdays as such and they usually rip up your tyres a bit more than Combe, Thruxton etc, but they are still good fun but all seem to be disappearing now. Used to have Colerne, Keevil, Hullavington and now Lyneham which were all local to me.