Heating and domestic hot water

[Brian]

Hello Annette and Andy.
I was holding off from replying to your question as i don't have any experience with plumbers or heating engineers out here.  However, in the absence of any other suggestions,  you could try visiting the Mairie for your village and asking for recommendations.  Apart from anything else,  it's quite useful to be known by the Mairie team as they tend to be involved in many aspects of local life.

Brian