Those pictures are not good. You need to loose some of the clutter and depersonalise. Does it cost more to put more pictures up, by the sound of it some of the rooms need pictures from 2 views to really show them off.
From my point of view
Lounge:- Lamp and industrial lighting unit to go.
– You have a chair in-front of a window seat WHY?
– Change the painting above the fire for some more neutral piece of junk from Ikea
– does the fire work? get some wood in there make it look like it does sell the image.
Garden:- Looks like a jungle cut it all back, lay some turf if you can afford it, 2-300 on grass to promote a nice garden will pay you back.
Kitchen/Diner:- Where is the Kitchen??? loose the stereo and flex, maximise the work surface space.
Hallway:- AAARRRGH red, tone it down, paint over it. Loose the pin board, it looks like it belongs in your man cave anyway.
Bedrooms:- So you say you have 2 where are the pictures??
Sorry if this sounds harsh but your agent should have been telling you this.