One man Limited Company working in Southern Ireland

I have a client who is trading under a limited company and is currently working on a contract in Dublin that currently is only a few months but could turn into a longer contract (6-12 months).  He is obviously wary of working abroad when it comes to the company and his tax position.  I admit I am by far an expert in overseas working so I could do with some confirmation of his and the tax position of the company.  His wife still lives in England so he is travelling home at least fortnightly.  He is only in the 4th week of the contract but would like confirmation as soon as possible.

Thanks