These all look like posters that are part of a collection held by the Bank of England (whose vault it is). The majority seem to be P&O posters (can see more in different views of the vault). There used to be an app where you could take a virtual tour of the vault - I think some of the higher res images arounnd are from that app.
Left most is Wings for Victory poster
Koala one is a P&O poster
Yep, looks like a Mountie