Operating hours etc. added to the ferry route relations in https://www.openstreetmap.org/changeset/101575195
This may take a while to propagate to routers.

Hopefully the access=no tags which were added and quickly removed did not reach any routers, as they would have blocked any mode of transport from being routed via the ferry at any time. This would be somewhat inconvenient for pedestrians and cyclists who are prohibited from using the Blackwall Tunnel.