From the photo, there is no RCD present.3. Electrics - RCD in place but the box is plastic and not up to regulations as should be metal.
It's a cheapo plastic effort with a main switch and 5 circuits. One of them might possibly be an RCBO. Entirely inappropriate for a modern 3 bed extended house.
The kind of item that a builder would shove in on the cheap to replace an ancient rewireable fusebox in a futile attempt to make it look up to date.
In any event, you should budget for a full rewire, as a property with no central heating won't have had any money spent on the electrics either.
£35k will not cover the works required, and even if it did, you would be paying full finished price and have to go through all of the inconvenience and hassle of having the work done.It's going for £225k
The property generally needs modernisation, new kitchen, bathroom, fixtures and fittings, including skimming and new flooring.
To be honest it seems the property is priced sensibly as this property in good standard should be towards 260k,
Offer them £190k which they will refuse, then you can offer £200k as a final offer.
If you then spend £50k extra to end up with something worth £260k then it's perhaps worthwhile if you are going to live in it.