That's your YEARLY budget?
I'd add at least a 20% buffer on top of what you think for random expenses...clothes and shoes, travel (bus or train or discount air tickets), tools, things needed for repairs, medications, gifts, games, entertainment, etc.
Will you NEVER eat out with friends?
One £200 expense and suddenly you're overbudget by 20%.
IMO, you should be shooting for a minimum of £3k/yr., maybe even closer to £5k, and I'm on the extreme side of stuff. Most would easily say 10-20k.
How much will the house itself cost?