Sorry, posted too early.

Want to "warm" up this space. Happy to replace rug. Red window seat cushion has gone. DO NOT want red to be dominant. Room looks cold & sterile to me. All comments or photos of rugs, throws, etc., appreciated

Going with your current furnishings, I'd be tempted to paint the walls in taupe, grey or even navy blue. Have a browse through houzz photos at navy walls, they look great and can cosy up a space.

Bringing some natural fibres and textures to the space could help also.

I would get rid of everything with red in it and go for more neutral tones with texture & pattern. Make sure your next rug is larger- it really needs to be just under the front legs of both lounges. A side table with a nice lamp and plush large cushions of mix match as well. A pic on the wall needs to pop ( hate that term but you know what I mean) but not dominate. Larger the better.

Good idea to add some warmth to the room colour with paint.

My first thoughts to warm the space up is a larger rug with a different colour pattern... I like the use of a persian but perhaps with more beiges and oranges or even muted blues.

The big thing I'd want to do it to is change the lamp, that is sterile and overwhelming in style. I think opt for 2 small lamps that can sit on side tables and have a warm yellow glow. Do that first as its easy and it will totally change the feel of the room and then think about changing the rug. Do you have any other rugs somewhere in the house you could swap with?

A larger artwork that doesn't have so much white in it will help too. And perhaps some soft drapey gauzy sheers near the bay window.

Its a nice room, but I think it feels sterile because its perhaps a little too well coordinated? Maybe by having more mismatched colours it would feel less sparce.

If you dislike the rug how about soft and shaggy with essence of warmth like...

Then in place of the tv unit a bank of timber shelving...And just a few new cushions and a throw...Which your chrome light will then need a coffee table to talk to...
And an accent chair?

Love all the ideas & the idea of an accent chair but the room is not very large

(3.7metres wide x 5 metres long) which is why I'm trying not to "clutter" it up

I think your on the right track, just needs a few tweaks.,
The couches need to touch in the corners.
Get a corner sofa table, usually a meter square.
The rug is ok but may be a bit small, should just tuck under both couches.
The TV cabinet needs to be larger. The length of the wall, I'm guessing 1800/2 meters?
Makes the room feel bigger.
I'd paint taubmans Glacier Grey on at least the feature wall. (Is the feature wall the wall with the artwork?)Great colour to compliment the couch and art work.
At this stage you haven't changed to much.
Add coffee table, table lamp and cushions to suit.
If your unsure, maybe go to freedom and Beacon with photos and they will help you.

You just need a bigger, thicker rug and a larger, heavier television unit. You could also think about replacing the legs on your sofa to a timber one... the chrome is really jumping out. A built in TV unit would look great on that wall if it fits within your budget!

A large ottoman with a large tray on top is a great alternative to a coffee table and has a softer, more cosy aesthetic.

I also think a larger artwork would work better.