Thanks everyone who offered advice. I've attached 2 pics of the almost finished project. Can't show the bed as the picture isn't up yet - my partner went to clean some mildew off the ceiling, didn't secure the A frame ladder and only wearing thongs almost severed his big toe when it collapsed underneath him. So a warning to all! Please don't get up ladders that have not been locked or wear unsafe footwear. The mirror and rug were from Gumtree and I made the curtains myself (thank you Spotlight for a sale on curtain fabric). We're very happy with the results (apart from the hospital visit involved). Statement light fitting also needed at some point.

I think it will look great...I have a huge mirror in my entrance way, its an 'arch' shape and is 1m wide by 1.6m high. If you are worried, trace round the edge onto paper and cut out a circle the same size and blue tac it to the wall to give an idea of how it will look.

Looking again at your space, I’m not sure there’s room for a side table, and you probably use the shelving unit for that. Is there an electrical outlet nearby as I’m thinking a floor lamp may not fit either, BUT you could clamp a lamp onto the top rail for the shelving unit. Are you keeping the unit or would you change it for something else?

Yeah the room is a bit tricky to work with as it has the French style doors that let you look in . The TV had to be quite far away from the fireplace due to extreme heat 🥵. I would love to do the pic below on two walls with different photos but not sure if it will be too much in such a small space ? Wall height is 3m so might be able to get aware with it