I am amazed at how little clutter you have! V impressive.
Ok, the only thing I wasn't too hot on was the colour of your garden fence. I would honestly consider repainting it.
I'd also want to redo your bathroom, nothing wrong with it and I expect I would be too lazy, but not my sort of bathroom. Prob not worth doing though, as someone else will have their own ideas but could you put new white fluffy towels in it? Think about how you might make that sill prettier or more stylish? Some shells in a bowl ?
That said, and I've also looked at the neighbouring houses, I'd want yo know about schools. It's not clear what your catchment is - indeed how your daughters get educated! And what will happen at secondary. I think your agents need to do more stuff on that. Can they say nice things about local transport? Because it sounds like a location issue. Or idle agents, have you thought if changing them ? Going to multiples ?