I suspect, in UK law there’s no such thing. How is it constructed?
Information is spotty on the page, it looks quite real so I suspect it wont be allowed. https://global.rakuten.com/en/store/reptile-d/item/caw43264/
But I had read this page http://weaponology.co.uk/useful-info/ how up to date are these Legislations? gov.uk website is almost impossible to find this info