You need at least £40k to do a middle range refurb on that house.
We've spent £30k in the North on our 1960's house. For indicative costs doing partial rewire (£2k), new drive (2k), new bathroom (£6k as included building work to move walls around), plastering and new radiators in almost every room £1k per room), half the windows done £300-400 per window), new front door (£850) new patio doors (£900), and a bit of rejig (mostly non structural) of layout downstairs (£1k), new internal doors (£150 each to buy and fit), new flooring throughout £300-500 per room including fitting). We've done some decorating (£120 per room when painting fresh plaster) and clearing rubbish to tip/in skip (£200 each time) etc. ourselves.
We haven't done the front windows, rendering, garden or kitchen