I took my new (to me) Sony A7Rii and 35mm f2.8 to a meeting in the Temple area then went to the Landscape Photographer of the Year exhibition on the mezzanine level at Waterloo Station. The low winter sunshine was beautiful.
I then tried out the low-light capabilities of the camera in the City. It's about a stop less capable for noise at high ISO (12600 is about the limit) and I also found the gtrain in the resulting images more intrusive than that given by my previous Sony A7S, despite running the tiffs through Nik Dfine2. I should be able to improve on this as I get to know the camera better.
