It is a very nice house - remniscent of my first!
Remove one of the sofas in the sitting room and also the coffee table to the left of the fireplace. Put down a plain, neutral rug (charity shop purchase?) to conceal the sitting room carpet. Don't have anything hanging over the bath. Remove the shower curtain during viewings. Put as much as you can in the shed, cupboards or the car or even ask someone if you can put it in their house or shed during viewings. Have one item on the mantelpiece.
Tidy the shelves in the dining room or, if at all possible, ship them out for viewings (difficult I know). Again, one item on the mantelpiece.
If there is any space at all in the cupboards, put away as many of the items as is possible from kitchen surfaces. Take down the poster in the kitchen. No tea towels hanging from the oven door.
Do you have a loft where you could store items?
Get a new EA and ask him/her to make more of local facilities - station, buses, shops, things to see (many in Portsmouth e.g. The Victory), lovely countryside a short drive away, more on the quality of local schools (name them if they are good).
Blue/lilac are cold colours - could you bear to paint the sitting room walls?
Good luck!