Temperature: London’s temperature on average during the summer months is 19˚C and 5˚C during the winter months.
Time difference: London has no offset from GMT so it’s GMT is +0.
Currency: The pound sterling (£ / GBP).
Language: The official language is English.
Required travel documents: The rules and regulations of travel documents and visa applications change frequently. There can also be different requirements.
Health: Information about the (mandatory) vaccinations change constantly. Current information can be found on Travel Health Pro and NHS or consult your GP surgery.