Stone wall insulation

[Orkatec]

I need help deciding how to best insulate solid stone walls (no external render)

I was thinking some kind of dry wall e g Kingspan with wood or metal batons or stuck on to the wall.
Would prefer to have a gap for services.

Thanks Lucy :?

[welsh brickie]

Try this method 50mm x 50mm pressure treated timber 50mm celotex insulation ,polythene vapour barrier ,then plasterboard and plaster to finish

[Orkatec]

Thanks W B
Its a bit more work but will it be cheaper than Kingspan k18.

Lucy