I've owned several of these two-up, two-down ex-corporation houses over the years and would wholeheartedly recommend them.
Some things to consider might be:
1. They don't hold heat well, even after insulating the attic. Dry-lining the main living room of the house might be a good idea and double-glazing is essential. PVC is typically cheaper than wooden.
2. The external walls of the house are extremely thick and difficult to chase. Even hanging a picture or curtain rail can be a bit of a nightmare.
3. Original floorboards tend to be easy enough to sand down with a hand sander and varnish. Just stain them a darker brown if they are in poor condition. If you're changing the heating, don't let the tradesmen haphazardly damage the floor.
4. Noise insulation between rooms is pretty bad, but not sure if it's actually any better with more modern houses.