Well turns out I got through
Sambatc - I checked as soon as I got the email and 10th Feb wasn't on the list, but to be honest I couldn't do that anyway - uni commitments + going to Paris the day after.
Currently booked in for 27th April at Prestwick, but will keep checking back for any dates at Southampton. Got my finals in May though, so I may end up having to go to Prestwick.