No spare tiles..

[Kevbos]

Do it in a darker tile and run a skirting tile round rest of room same height .maybe ??

 

[Kevbos]

Trim top of skirting and sit on face of rest of walls .looks like it done purposely

 

[WetSaw]

Quick update..
Even though the client told me they had looked I decided to have a good look around their storeroom. Buried right at the back under other stuff, covered in dust and dirt I found a load of tiles! Luckily for them just enough of the right ones and even 2 of the border tiles to replace the ones that had been cut for the old shower screen.

 

[Andy Allen]

Can hardly notice it apart from the pristine white grout...🙂

 

[Chalker]

Good find.

Think a bigger screen would have been a better option. Though you could fit a deflector panel if needed.

 

[WetSaw]

I did suggest a screen with a deflector but they just wanted a plain panel. It is 90cm wide which is wider than they originally wanted. Maybe they like the whole bathroom wet!
They don't know that I found the tiles, they arrive Wednesday so I hope they'll be happy...

 

[Time's Ran Out]

So everyone's suggestions were a waste of time then!
Manana 😉

 

[WetSaw]

It would appear so!