Sorry! Just posted this on General also - then realised it was probably more appropriate on here as I''ve only just become very suspicious of H behaviour

I live in UK and don't know much about this. But does anyone else in my corner of the globe know how to go about hiring a good marital private investigator?
Could anyone recommend one?
How confidential is the service?
And how expensive?!
And how succesful are these guys usually, when it comes to uncovering evidence re an EMA in progress?

Thanks for any tips or advice