Jersey Taxation

We are a UK Ltd company and have just employed a new sales director
He will be officially "working from home" in Jersey with occasion visit to the company offices in the UK and various overseas trips.

He has provided a Jersy tax code and tells me that he doesn't expect to pay UK income tax.
a) is this correct
b) presumably means he can't be processed through a UK payroll

Thanks for your help

Stephen Burt