Bought this 6 months ago and still super comfy - highly recommend as one of the thicker ones we could find and reviews are great. Dunelm did have a dormeo one yesterday that was similar in store but think that was around £150 for the king
Its for a Panda?
Also checkout B @ Q has offers on mattress toppers... https://www.diy.com/departments/home-furniture-and-storage/bedroom-furniture/beds-and-mattresses/mattress-toppers-and-protectors/mattress-topper/_/N-skbZ1z11tca
I can never remember if I've bought a memory foam topper!!!
Bit big for a puppy training pad.