I would be checking on what needs to be done. I would expect it needs a new roof, electrical, heating and plumbing plus possibly some work done to cure damp problems. Since you need new kitchen and bathrooms anyway you might as well go the whole hog.
Now, this is where I differ from many... I have done gut renovations but did it to flip houses in the late 90's so I had to do everything in one go. As you plan to live in this house I suggest you do one thing at a time but do it so you are doing work now for later. So, when you rewire, figure out how you want your kitchen and bath to end up and have them wire to that plan. I would do the plumbing at the same time as you redo your bathroom. Windows look old and I wouldn't bother replacing them but I would buy thermal curtains otherwise you will lose your shirt heating the place. With an old home you need lots of drafts otherwise you run the risk of mold if not properly ventilated. New windows that are not installed properly can cause lots of problems down the road.
While you can spend GBP50-100k doing the place up you can save a lot of money in numerous ways. In a couple of higher end homes that I sold in 2001 for GBP400k in the North West I used Wickes for kitchens but had a carpenter come in to customize both the kitchen and bathroom. I saved a fortune by doing as much myself as possible. When I got kitchen cabinets from Ikea I assembled them myself and hired someone to put them up. I would call around for granite countertops all the time. I rarely paid more than GBP1k for a full kitchen including undermount sinks, full backsplash, proper edging and etched drainage. As an aside, I only put in granite just before I sell if I think it needs it. I hate granite myself and prefer the linoluem countertops.
DH and I have just bought a row house in Hoboken, NJ USA and everyone is giving us quotes of $500k+ for renovations. When I have priced it out myself I can't get above $200k for installing central air, new roof, new wiring, two new kitchens, new windows (12 of them) 4 new bathrooms (3 full baths and 1 half) plus an outdoor kitchen. I just don't believe in going ultra high end. Ikea kitchen cabinets are damn good if installed correctly and I have 2nd hand high end appliances which are all less than 5 years old (I have picked up a viking stove, double fridge freezer and miele dishwasher for less than $5k in total whereas to buy new would have cost approx. $17k). Another neat trick is buy a 2nd hand solid wood high end kitchen and replace the cabinet doors. I helped friends with this and saved them over $30k on 'custom' cabinets.