united : I pretty much agree with the previous posters. The photos really aren't doing your house justice, particularly as they're so dark and not all in focus.
The outside of the house really does look better on street view. I agree that several pots with plants would cheer the front up no end. What is the bit of trellice for about the door?
Photo 3 of the living room is dreadful. Your EA should be shot for thinking that was acceptable. It's completely out of focus and makes it look like there's a big stain on the carpet. It would be better with the door shut and if you moved the small square table out of the photo entirely to make it look more spacious.
I'm not sure what the purpose of photo 8 is. It only seems to show that there's a big empty space at one end of the room. It would look better with the kitchen door closed. It looks a bit cramped with the two sofas and side table, like you'd have to squeeze by. Maybe move the side table out of the photos entirely to make it look like there's more space.
Your kitchen is lovely, but it looks very dark and the worktop so look very cluttered. Try to reduce the stuff on them to what's absolutely essential. I don't know if it's the lighting in the photo, but I'm not convinced that the yellow on the wall works all that well.
Photo 6 would look better if you moved the table to be more central in the area. The notice board needs decluttering and the wine rack looks slightly odd with three bottles in it (and not all facing the same direction). What is the plug in the middle of the wall above the radiator?
The garden photos are a bit confusing. It's a nice garden. She photo 2 of yours or your neighbour's garden. A photo of your own garden taken at ground level would be nice. The decking and seating area is a nice feature.
I agree that the study looks very cluttered. Having two chairs at the desk looks slightly odd. I agree that the bookcase is very dominant, and there's some stuff piled between it and the desk. The filed paperwork at the end of the desk also looks a bit cluttered. Again, I'm not sure if it's the lighting but the red on the walls feels very dark. It might be worth painting it a more neutral colour.
I agree that the wallpaper in the master bedroom is very dominant and that it looks cluttered. The dressing table is covered in stuff and appears to have wires hanging down the front of the drawers, there's also stuff on top of the stool. Clearing this would make a big difference. It would probably be better to put the photo frame on the de cluttered dressing table rather than the window sill. I think that moving the taller chest of drawers would also be useful. It's taller than the window sill and makes it look cramped. I'd also move the washing basket and take the pyjamas off the pillows.
I agree with everyone else that the bed in picture 12 should be turned around. The photo would also look better without the bin or the pile of clothes.
I'd really want to see photos of the other two bedrooms too.