Tile lippage - shall I stop the work?

[Tile Shop]

Mapei do a product called Fuga Fresca which is basically a grout paint. Order that in 134 and it should match the existing grout:
Fuga Fresca 134 Silk Singles 160grm - https://lilleytileandstone.co.uk/fuga-fresca-134-silk-singles-160grm.html

 

[Stefan]

That looks exactly like the tile which was installed in my brother in laws house. There may be lippage because plank tiles like that are known to bow. I've had problems with these in the past and have told customers about this and they've ordered different tile as a result. An easy way to check this is you turn the tile sideways, look down the tile the long way as if you were pointing a rifle and looking down its sights. If it looks like a banana, stay away from it.

 

[Time's Ran Out]

Or use levelling clips!

 

[WetSaw]

Or use levelling clips!

..and 1/3 bond!

 

[ReX83]

@Paul C. thanks! I didn't know about this product. I will order and try on a small area. Do you know is the finish is going to be matte as with original grout or more glossy/satin like paint?

@Stefan, I did this exact check when he mentioned that it was due to tiles. The tiles were actually perfectly flat.