As a 2 bed (or 2.5 bed) with additional study space + with a dining space, i'd have been interested in it when we moved to a 3 bed - as we didn't really need 3 beds and converted one into the study, but wanted a dedicated place to eat as our previous 2 bed didn't have enough floor space to have a table up, the eat space was a breakfast bar at the end of a galley kitchen. Most 2 beds don't have the space for a dining room and that is a really important space for me and many others.
However, if I was actually looking for 3 beds then I'd have been disappointed when I saw the '3rd bedroom' on the plan. As a study space or a nursery it's fine, but if I had 2 children over the age of 6, say, who I knew would not want to share in the near future, I'd rule your place out. It's fine for a baby or toddler but that's about it.
I'd probably also drop the price to below £160k. You bought for £125k and I can't see why it's magically gone up £40k in value over the past 6 years when the kitchen and bathroom (the two most expensive rooms to fit out) haven't been changed. I also looked at 'last sold price' for properties and compared photos if available (and this was getting on for 10 years ago, so I imagine that buyers are even savvier about what can be found online now).
Superficially you can add some pot plants or something, or a hanging basket out front, and definitely give a coat of paint to the peeling storage shed. if the price is right people won't care about the pebble-dash - you live inside your home, you don't spend the whole day gazing at the facade!
It's a very nice starter/small family home and that's how I'd market it/who i'd expect to be interested. But I think this will require a rethink of tactics and a price reduction. When you show people round you can say 'we have nearly the same floor space as next door, which went for £170k' so it feels like an even better bargain (at the moment it compares poorly to your neighbours' house in presentation, layout and cost - theirs is more than £8k nicer).