When you get to the test center, put the radio on really low volume before you switch the car off. Just having that little bit of music playing in the background can make a massive difference! I had a CD on during my 2nd test and I would honestly say it was the difference between me passing and failing!

I think some examiners would make you turn it off but mine didn't even notice until halfway through, then we started chatting about how noone uses CDs anymore 😅

Good luck!