ANCPER
No I'm not a firey, but know a guy who was. I do recall him telling me about skin penetrating devices and he worked in Australia. So some ports may have that capability.
I don't know the ARFFS capability of all the airports between Australia and London. But what I'm saying is where possible and that includes if time is available and there is no greater urgency. To utilise the fire commanders advice.
Like, I said. They can use infrared so they can pin point a source of heat and they can pump suppressant into a cargo hold pretty quickly and immediately see via infrared if the fire looks contained.