I've just bought a Margot double bed and totally baffled by the dimensions - the mattress doesn't fit (it's a standard size Loaf mattress).
I have two other Loaf double beds and the mattresses fit perfectly to the edges, but the dimensions of the Margot are: width 147cm, length 203cm whereas a double mattress is only 135cm x 190cm, so there are huge gaps down each side and end of the mattress to the bed which looks ridiculous (and not as shown on their website pics).
I'll attach pics to demo.