Logans Guest House,
Run by a really nice couple from New Zealand. £30 for a single room and breakfast.(Bit more for ensuite) Comfortable rooms and lovely people. Its just by the Moat House near the North Terminal, not a few minutes walk, but £3-4 in a taxi, or the landlord might even give you a lift in if you ask nicely!
01293 783363- lplease let them know I recommended them - I owe them a few favours!
Cheers,
Charlie Auty