How about have the central units/island going a bit longer to separate the kitchen and dining room a little more and don't put the extra cabinets on the right hand side wall which seem to invade into the sitting room area. In an open plan setting it's always good to maintain definition between the spaces. So keep your sitting room area clearly that & lengthen the central island in your kitchen. It'll look lovely

How about keeping the gravel as it is - it keeps the weeds down after all and is low maintenance but planting something like lavender through it - nice smelling, will soften the edges and required very little looking after except for a cutdown once a year - can't tell exact scale but 7-10 3l lavender plants planted through could make a big difference pretty quickly and inexpensively

Solar control glass? https://www.duration.co.uk/GlassOptions-SolarControl.asp

Hi Rumkini, Thanks for that. I’m not sure you picked up on all the doorways and walkways?, so I've put red arrows on the crucial well worn routes, one being the Kitchen, and the other the main entrance/central walkway. I thought about an “L” arrangement, but as you say, you cant recline onto each-other, it creates “premium/preferred seating”, and less routes to get around. I’ve looked at your plan, and by moving the tv facing couch much further back, may work, but only with slim or no end tables as I think the coffee table would end up too far away, and it really restricts the main walkthrough. I’m looking to level the playing field on the seating options and certainly in favour of the idea that everyone will have the same view, not fighting over “the” TV junky spot (or rather Elite Dangerous on the Xbox spot when it comes to my 13 year old along with wires, laptop controllers...sufficed to say I'm moving the boy OUT of the living area). Re, view of the tv, the further away you are is the better view, it’s a compromise, optimum viewing vs facing eachother, but to be honest, I don’t think many ever sit on the end of a sofa with a comfy arm rest in a regimented position. The odd thing is, being a curved tv helps me out a bit, genuinely, with the angles. The Dining table is a 6 seater 1800x900, and I have a foldaway 900x900 catering table to extend it for Christmas. I did put it to scale on the plan, but showing it all out on this next picture, and I’m not concerned about that at all, it has space elsewhere for now. Besides, I “will” have room to put it here, but not yet. After trawling through sofa options, I find it is possible to have a true 3 seater at 205x98 rather than nearer 230x210 with reclining ends. Also, I can sell my 600x600 oversized lamp tables to opt for 200x600 slim end tables. The rug I've put in for scale is 2000x1400. With or without the smaller couches, I'm finding that perhaps the TV should actually stay right where it is after all, plus reducing glare from the window especially at this time of the year with the low sun. If I took the top picture, keeping the tv where it is, and take on board your idea that I do have the room to move them further apart/more into the dining area, I can fit something inbetween too. I red circled the couch over the corner of the window/radiator... it sets off something OCD in me. Even if the couch was to be pulled away from the wall, it restricts the main walkthrough whether it is this way or the L plan suggested.