There are a lot of products on the Market. Here are some of my notes I’ve made when I’ve been researching the products availbale: https://www.wickes.co.uk/Knauf-XPS-Laminate-Plus-Insulated-Plasterboard-Tapered-Edge—27mm-x-1-2m-x-2-4m/p/163699?fix&gclid=Cj0KCQiAsdKbBhDHARIsANJ6-jeV78Lz03drfyBsxbbviTwTenUpkwKF60WCR4yQOmUslLYK-D2O-CMaAvH4EALw_wcB&gclsrc=aw.ds