You should install the WC pan first, and then cut the tiles around it. Depending on how thick the tiles are, you might need to install a packing sheet of moisture resistant MDF or similar so that the WC lid stays up - just make sure the sheet is small enough to be hidden behind the pan. Good luck!

I had this prblem in my holiday let cottage, by the sink and behind the bin, we used glass and had it painted to match the walls then professionally installed no screw holes or covers almost seemless. each panel was about £100 fitted. we also had a splashback fitted in a different coour behind the hob. now thinking about doing it in my own kitchen.

Thanks Daisy, yes, must be from a cleanliness point or view. He also said to have something solid there. The tile shown is a matte 120*60 porcelain tile - it’s going on the floor and shower area (the walls perpendicular to the toilet wall shown) I was also thinking I could put a different herringbone style tile on the toilet wall - green pic below or even go up half the wall with either tile

Thank you all for your inputs. We are planning to make it open plan opening the kitchen to the dining room/extension. The walls of rest of the area is Magnolia, therefore, kitchen walls have to be the same. The kitchen cabinets will be glossy white from Wren, worktop is black. Need to finalise the tiles for splashback. I think soft warm white tiles will go well with the colours in the kitchen. Would love to hear any other suggestions. Thanks again!