A lamplighter ?

There are 1600 gaslamps around London still and they all need tending. This one is outside Westminster Abbey and the chap says he spends quite a lot of time talking to tourists about his job !!!!

This from google:

There's still a small workforce employed to maintain London's gas lamps with duties including checking the mantles and giving the lamps a weekly wind-up (the timer is controlled by a clockwork mechanism).