I think you'll have to go with white or whatever looks best indoors in those rooms. You can always think about getting the windows colour bonded at some point instead of replacing them. Then you can choose any colour for those inside and out! You can paint UPVC yourself - All of our windows inside are painted the same colour as the walls in those rooms so that the windows blend into the walls. They were dark brown / mahogany ( vile ) - Outside they are all sage green. If you're going to paint the frames inside which will brighten the rooms and let you have whatever colour shutters you like, use Zinsser 1-2-3 primer and then paint away.

I’m in Hertfordshire and I used Globe Home Improvement. They have offices in Beds and London. I’m not sure if they cover your area but worth a call? Have a look at their website and Facebook page. They are a family run business and Phil is so helpful. Great after-sales service too.

My friend has Corian in her kitchen as a seamless worktop, sink and splash back. She also has it up and over the window sill. It looks great but it does scratch easily and it does leave watermarks. She had been talked into it by the kitchen company which she now regrets. It wasn’t cheap. I think granite is incredibly hardwearing if your budget stretches to it. Quartz is very popular too.

Hi Jason! Personnally I wouldn't block it, I think that it would be a waste of money. Even if it doesn't bring enough light from the outside currently, it will still help with air circulation. And you don't even need tons of natural light in your bathroom to create a fabulous space ;) I previously designed a bathroom that doesn't even have a window. By modifying the lighting and playing with some colours it really changed the perception of the space! If you need any additional advice on colours, arrangement or home renovations, don't hesitate to contact me ;) I am an interior designer who loves to play with colours and offers playful, offbeat and anti-gloom designs that are completely unique! Here is my website:https://www.rainbowshaker.com/ Have a good evening! Justine