I'd remove the yellow chair,it makes the room look smaller and the picture you have facing from your window towards the yellow chair and your dining room makes the room look bigger than the previous picture of the same room.
I'd tell your estate agent you want another better picture of your lovely kitchen and of the dining room.
The bedroom in picture 7 I'd remove the pictures and the clock that you have on the chimney breast and I'd place one nice large picture there instead and I'd take down the picture near the curtains and I'd take what's on the bed off(not sure if it's a toy)and I'd remove the stuff from under the bed.
I'd also take down the storage boxes ontop of the wardrobe otherwise it can look like the rooms struggling for storage space.
You don't need to do anything major in that room it just needs to be dressed.
Picture 8 the garden it looks okay it's nice and tidy but it looks a bit sparce,a nice clematis or Jasmine growing up against the wall at the back and I'd have something near the fence on the left handside.
People tend to sell Gardens as an extra room now,so again just like the bedroom it just needs a bit of dressing.
With the bathroom is there supposed to be something in the blank space?near the sink?apart from that I'd put a different coloured towel in there something that goes with the colour of the bathroom and I'd get a picture from a different angle,buyers will want to be able to see what else is in the bathroom when they're looking online.
Picture 10 the room looks a bit unloved and I can't see any storage.
I think one of the biggest problems is the pictures,I couldn't see any of your 4th bedroom and there's not a great picture of what I presume is the master bedroom.