Calling all armchair generals! Boudica's Last Stand.

[MonsGraupius]

most of Roman Southwark was destroyed by fire at the same time as the main city. So the rebels did cross south of the river, either by bridge or by ford, and the Thames was not an impassable barrier or a moat, and anyone hoping for safety on the southern bank would have been sorely disappointed!

Well said.  I couldn't agree more.

Might you care to substantiate that claim that all of Roman Soutwark was destroyed AT THE TIME of the fire.

All I can find is a single article in Current Archaeology with no dating:

Here, an archaeologist is seen drawing the layers of burning found  in one of the buildings flanking the Roman road at London Bridge. This provides the evidence that Boudica crossed  to the south bank and burnt Southwark too: thus Southwark must have existed by this time – and does this mean that the London bridge had also been constructed?

A Roman lamp

One of the most remarkable finds was this pottery foot which is in fact a lamp – the wick burnt in the big toe.

So, as far as I can tell, a single property in a single fire, burnt down where the main artefact which was found: a novelty Roman  lamp in the shape of a foot, had clear burning over the edge and down the side of the big toe which looks like a clear fire hazard to me  ... so might I suggest it was in the middle of the fire ... and was a single isolated event that had nothing to do with Boudica.

Addendum
Two things strike me about this novelty Roman foot oil lamp. The first is that almost no other Roman oil lamps show the burning. That indicates that normally, the oil lamp burn cleanly. Instead this oil lamp, was clearly burning with thick brown smoke that massively stained BELOW the level of the oil and as far as I can see right down to the supporting surface. It was clearly burning with a sooty flame ... just before whatever it was on collapsed onto the ground where the lamp was sealed from further changes.

The second thing, is that most Roman lamps were made with a platform at the front, and or an upward tilt so that the wick stood upright rather than hanging down, and likely syphoning oil, down onto the supporting table. So, basically this is an extremely bad novelty design almost tailor made to catch on fire.

Image of novelty foot lamp that appears to have caused the fire.