Really? TO THE INTERNETS!
"Obscene material" is prohibited, that does not ocunt ******. A few other searches confirm this. You're fine.
I can think of some interesting hiding places for them.
Or. Or! You could mail them to yourself.
I have taken vibes between the US and the UK multiple times and never had a problem, that includes putting them through x-ray when they have been in my hand luggage.
Don't know I tried to search on Internet and got sources for Adult toys!
I'm not sure, but when my brother-in-law was touring, they made a stopover at our house before going to Canada, to drop off the swords, all the pyrotechnics, the bowls, the moonshine (bus driver had that).....and all the p0rn0s.
Banned? Wow, what are they afraid of, vibrators filled with plastic explosive?
Why would you want to :/
There should be a list somewhere online.