Thanks again for all the tips everyone. I will definitely try and declutter a bit more and rearrange things in the lounge as lots of people seem to agree on these points.
With regards to pictures etc, I have a huge very colourful painting in the lounge, it just happens to be on the only wall not photographed. And on the right of the fire I have a chest of draws with pictures, a plant, lamp, ornaments and flowers on. So I think perhaps the photos make the room a little plainer than it is.
In terms of heating, we have electric heaters and the house is always warm when people come and view.
The neighbours are all lovely and no students I know of, its a nice quiet road.
Pricing is difficult, as its less than I had it valued at independently, and less than most of the similar properties near by. Two others on my road are on at £115k and £122k. I think I will declutter etc, try new pics and be more patient.