Just for your information Peter.
I understood it was only the charms they put on them and not the bands themselves that was a problem.
See this link from Loom band cancer warning as rogue 'charms' contain deadly chemicals | Daily Mail Online
So if you have loom charms you might want to think again.
We checked our Grandsons set and they had the CE mark but didn't have the packaging for the charms so they went in the bin.