I'm pretty much in accord with almost everyone else OP. You have a lovely home.
For an advertising critique though the first photo of the exterior front is not well shot. All the blinds should be up and the house shot from the opposite angle which, as an end terrace will make it look bigger and remove the shadow. Not sure if you want to remove the toys from the garden just while it's photographed, but I would do that and also have a look how the garden appears if the shot's taken from one of the upstairs windows. It may give a better look.
Your furnishings are mostly grey and neutral colours, but you have quite a bit of pink and turquoise blue, so I'd go with only those shades and change your sofa cushions, towels and toiletries to match. This leads the eye through the house with a sense of flow and continuity. Introduce some of those colours to your main bedroom and also the hall. I'm not talking about a lot, just some subtle touches. The hall could be made to look more attractive and welcoming rather than functional.
Outside the front I'd plant a climber by the trellis and put a nice pot of pink flowers to go with the interior pink, by the side gate.
All in all, those ideas are not difficult and nowhere near as much work or expense as it might sound.
Can I ask why the stamp duty is going to be paid? It amounts to £400.
It makes you look a bit desperate to move and so I wouldn't do that, I'd remove the 'offers in excess of' remove the stamp duty incentive, put the price up by £1,000 or £1,500 if your market would stand that and then be prepared to drop to a lower sale price for a purchaser who could proceed.