Steam train over the Wharncliffe ViaductAndrew Liles2022-09-18 | The Wharncliffe Viaduct in Hanwell West London was the first major structural design by Isambard Kingdom Brunel and built in 1836.
In this video you'll see the 34046 Braunton steam engine pull a train from Paddington to Chichester on 18 Sept 2022. The engine was built in 1946
You'll need an unusual tool: TORX T40 key (en.wikipedia.org/wiki/Torx). It is possible that you'll be able to remove the bulb with a regular screw driver; only a quarter turn is needed. You may also need a pair of needle-nose pliers.
Bulbs can be found on eBay/elsewhere, search for "HP24W G4 DRL Day Lights Canbus". The video illustrated removing the manufacturer-supplied traditional bulb and replaced with a generic LED.