In reply to andrew sandercock:
Have you looked at Easyjet?
I've just looked at their site.
Out Stansted-Alicante 18th April £39.99
Return Alicante-Stansted 24th Feb £24.88
Total Return £64.87 without hold luggage
Hold luggage 1 bag 20 kilos is an extra £18.
Can you manage with hand luggage only to keep weight down (ie rely on your mates to take ropes, etc?) otherwise it brings the total to £82.87
Good luck!