Asda have a really good range of cosmetics and toiletries in 100ml (or smaller) containers, including toothpaste, specifically for people who are travelling by air.
Right, I'll take an old tube for everyone to use before we fly and then just chuck it and put the new tube in the proper suitcases. Thank you, it's all a bit complicated (wonder what sort of damage you could do with toothpaste (if you were so inclined)). Hope toothbrushes are allowed :)
I don't think you can do damage with toothpaste - but you can do damage with some liquids that are disguised as toothpaste. As someone has said - all liquids, gels, pastes, creams etc must be in containers no bigger than 100mls, up to a maximum of 1 litre (I think) and packed in a small clear resealable bag which must be kept separate so it can be checked separately.
Don't put in suit-case. All liquids, gels, paste need to be in clear plastic sealable bag for checking. Thanks Supadrug. Made everything simple for me.