If you put vaping in UK checked luggage, you could be caught by UK Customs as vaping usually contains nicotine, which is prohibited by UK law from being brought into the UK.
Even if you are licensed, you may need to provide additional documentation and pass certain customs checks.
So, before traveling to the UK, it's a good idea to know the UK's laws regarding e-cigarettes or vaping to ensure your luggage complies with the relevant requirements.