There is a bit more detail about the approval for use at the airport (ie ETCS) in this article:
https://www.railwaygazette.com/uk/crossrail-emus-approved-for-etcs-operation/56488.article
Anyone know any more about what the non-conformance comment is about?
Available here: https://orr.gov.uk/__data/assets/pd...uthorisation-class-345-ccs-tsi-2020-05-06.pdf
Office of Rail and Road said:Network Rail Summary of Compatibility (NRSC) shall be issued in accordance with RIS-8270-RST issue 1 prior to trains being put into use.
This explains why they're not carrying passengers yet.