Even though they have only tested one carriage wouldn't the coupling mechanics need to be tested too in extreme weather to make sure the they dont freeze open or shut, or Come open due to expanding and contracting metal in heat.
345002 is currently undertaking some mainline mileage accumulation between Brentwood and Ilford. This is the first time it's left Ilford yard under its own power.
It would appear that the 345s don't / won't fit into many of Liverpool Street's platforms.
Something that needs to be sorted very quickly. I seem to recall reading (but can't locate the source) that only four platforms out of 18 are gauged for the 345s. And these are all random platforms, not consecutive, or the 'proper' TfL Rail platforms.
Pretty sure that was from one individual photo with no evidence, and I believe has already been debunked on here?