Gallery: HMS Montrose sails out of Canary Wharf
Royal Navy's HMS Montrose sailed out of Canary Wharf's West India Docks on Tuesday afternoon.
Crowds gathered to watch the Type 23 Duke-class frigate squeeze out into the Thames and head east to the estuary after its first visit to the capital.
She was launched in 1992 and commissioned into service two years later. Deployments have included the Falkland Islands, the Persian Gulf and, most recently, Syria.
It arrived in Docklands in the the early hours of Thursday morning and has been conducting capability demonstrations for schools and groups in Tower Hamlets.
On the arrival, Commander James Parkin said: "It is a tremendous opportunity to take any warship up the Thames into the nation's capital, and my hard-working men and women are greatly looking forward to experiencing all that London has to offer, before a period of intensive operational tasking in the Baltic."
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As one ship sailed out another visited the capital with passenger vessel Berlin making it's way round the Isle of Dogs towards central London.