Avro Lancaster B.VI Info?

Hi guys!

Does anyone have any solid information on the Lancaster VI? That was the Lancaster fitted with Merlin 85s in annular radiators (very similar to a Lincoln installation) for high altitude use. I’ve read various scraps of information, such as that there were 9 converted from B.IIIs, and I’ve read that they were capable of 345mph at about 30,000ft, although I’m not sure I trust those figures.

I’ve only ever seen one photo, so if anyone else has better information, I’d love to see it.

Thanks!