At the end of the day its only the tests your doing so your not under scrutiny.
I went for my tests on wednesday in t-shirt and jeans and was the only one as everyone else was sooted and booted

which wasnt bad considering it was a warm day for manchester!!!
As for eurocontrol...... when I sat the interview i was suited to the nines while my co-applicant turned up in t-shirt and shorts!! and got on the first couse
Thats europeans for ya!!!
BT.