Total is c. £70k sans kitchen.
Context: house is old 1930s. Not much has been done in over 40 years.
£2.5k for stripping old wallpaper + carpets and clear. ABOUT RIGHT
£7k for "complete decorating" (assuming this is painting 3 bedroom, living room, hallway + a installing flooring in said bedrooms) BY THE TIME YOU'VE MADE GOOD THE WALLS, ADDED NEW SKIRTING I PRESUME, DONE ALL THE WOODWORK IT'S EXPENSIVE BUT NOT CRAZY. I WOULD THINK THAT 5K IS ABOUT RIGHT
£7k to plaster all room UNFORTUNATELY PROBABLY AS THE WALLS ARE GOING TO BE A PROPER STATE ONCE YOU'VE REWIRED AND STRIPPED
£6.5k rewire house (inc. new meter box) YES AFRAID DO AND ASSUMING THIS INCLUDES ALL THE WIRES FOR TV / NETWORKS ETC
£6.5k new combi boiler and plumbing (replace hot water cylinder) YES. YOU MAY WELL NEED NEW PIPES TOO
£15.5k clear old kitchen, fit new. new roof, re
move wall, install rsj YES, THIS INCLUDES RSJ's, ROOF, WALLS ETC NEVER GOING TO BE CHEAPER
£4k kitchen worktop YOU CAN DEF SHOP AROUND FOR THIS
£4k new window in kitchen + bifold door PROBABLY RIGHT. THERE WILL BE MAKING GOOD OF OUDSIDE WALLS AND BUILDING STRUCTURE AROUND THIS. IT MAY NEED SOME SUPPORT TOO AND WILL DEPEND ON THE SIZE OF THE BIFOLD PLUS QUALITY
£3.5k new lights in lounge, remove back boiler, new flooring, new lights, remove french doors YES
£4.5k downstairs loo - tiling walls, floor, install new fan, new sink, loo, shower (+ clear existing) POSSIBLY A BIT MUCH BUT DEPENDS ON THE SPEC YOU ARE GOING FOR. YOU CAN CUT COSTS BY JUST PAINTING AND HAVING TILES ABOVE THE SINK. DEPENDS TOO IF YOU ARE HAVING THE TOILET BOXED IN AS THIS COSTS MORE
£6.5k upstairs loo - new bath, toilet, sink, flooring, walls (+clear existing) YES, GOOD PRICE
£3k new bedroom doors + fit YES, DOORS ARE INSANELY EXPENSIVE ESPECIALLY IF YOU NEED ANY FIRE DOORS WHICH YOU WILL IF YOU ARE OPEN PLAN. THEY TAKE FOREVER TO HANG PROPERLY AND YOU NEED HANDLES / LOCKS ETC
I think that this looks pretty much spot on. The bathrooms are perhaps slightly expensive but not if you include all the sanitaryware. The rest looks more or less right. I think that the worktop can be done cheaper. your biggest cost is on the kitchen. The knocking through and the RSJ is going to be expensive and costly. The plastering of the walls is likely to include the making good and that kitchen area is a big old job.
If you're renovating a house which hasn't been touched forever you will very likely need new pipes too and therefore your plumbing price is more than reasonable. I don't even want to tell you what ours ended up costing.