When we fitted our Twyfords Provencal suite we bought a "bog-standard!" mahogany seat. This did not fit so we had to order a VERY EXPENSIVE one (about £78) from the plumbers merchant, supposedly specially-made for the Provencal.
It soon started to fall apart, the veneer came unstuck, the rubber washers perished, but we didn't want to spend a fortune again.
I decided to take a chance on this one from Amazon, thinking that I could always return it on Amazon's excellent returns system.
It arrived this morning & we were thrilled that it fits the Provencal perfectly, at a fraction of the price we paid before.
If you have a Provencal suite, this fits perfectly. Thanks Amazon!!