Will my car fail its MoT because the third brake light doesn't work?

Is the high level braking light part of the MoT test? I have read somewhere that if it is fitted it must work. Mine has stopped working and I cannot find out why. If I remove it completely as long as the...

Is the third brake light at the rear part of the MoT?

Is the third brake light at the rear part of the MoT?

When we turn the lights on our car - the brake lights come on instead?

My son has a Renault Clio Mk2 and has noticed a fault with his rear lights. When he turns his lights on, the brake lights are coming on instead and do not change or even flicker when he presses the brake...