Conversation so far:
how many cars fit on the woolwich ferry
The new Woolwich ferries will each be able to carry 40 vehicles
when did the woolwich ferry begin operating
The Woolwich ferry began operating on 23 March 1889
how much does a woolwich ferry ride cost
The Woolwich Ferry is a free vehicle and pedestrian ferry across the River Thames in East London

Question: who operates the service
Self-contained rewrite: who operates the woolwich ferry service