[PSUBS-MAILIST] Triton sub cabin fire (March 2019)

[irox via Personal_Submersibles]

I came cross this article about a cabin fire in what I believe is a Triton sub:
https://www.businessinsider.com/british-research-sub-surfaces-after-fire-300-feet-below-india-ocean-2019-3

Does anybody have more details on this incident?

The article is a bit light on details, although the fact it took 23 minutes to do an emergency ascent from 100meters/330feet to the surface is worth noting.  That seems like a long time.

Thanks,
 Ian.