The only way I see it coming is as part of a GEML route out of Liverpool Street. The Paddington to Reading and the Heathrow sections won't happen
Plus ATO being a huge disincentive for the Underground section, not to mention DTG’s ongoing aversion to light baking the tunnels and stations.
Would tend to agree, while the 345s are great trains from a driving point of view, there's an all-stations stopping pattern, ATO along a fair section of the route (manually lining a train up with the platform doors will be a pain) and single bore tunnels so you can't see passing trains and no freight. The mainlines either side would be preferable.
