Most UK transport operators prohibit vaping on vehicles and in stations or platforms, even in outdoor areas. Of course, you can carry vapes, that is allowed, though some rules may apply, but vaping is prohibited in public transports.
Carrying a THC vape carries significantly more risks as they are usually prohibited. It is highly advised that you do not carry any vapes that may contain THC. If you intend to carry a vaping device, it should be switched off in hand luggage, and you should not use it on board unless clearly permitted. Policies vary by operator, so check their website or station signage. If travelling through airports, follow liquid limits and battery rules, and expect enforcement from staff or security if you vape where it’s not allowed.
