I know this area well. And I can honestly say Castlefields is a bit rough. Not the worst area in Shrewsbury, but I would never buy there. And that house needs a LOT of work doing to it!
Toilet in the lounge dining room?! WTF?
I suppose it does have some redeeming features, old house so probably quite solid and soundproof. Fairly big back garden too. Also, not far from the train station, and shops and facilities. Fairly close to the River Severn too. (Though sometimes that can be a curse!) Although I think most of Castlefields is elevated some 15-20 feet above the pathway that goes along the side of the river.
.