Looking for a surveyor that can act as third party independent

[Redpea]

Hi,

Unfortunately I have got into a dispute with a tradesmen about a sub standard tiling finish. He has had two chances to rectify it and it's still completely sub standard. I am looking for advice or a recommendation to bring in a third party independent surveyor so I can get their view. I would like them to produce a report on their findings.

Can anyone suggest a company that can do this?

Many thanks

RP