London Mayor Boris Johnson talks to Bob Crow from RMT
4 February 2014 Last updated at 14:46 GMT
The RMT union leader Bob Crow and London Mayor Boris Johnson have talked for the first time in years ahead of a 48-hour strike by London Underground staff.
RMT union leader Bob Crow went to City Hall to talk face-to-face with the mayor.
However, the mayor was taking part in a radio show so their conversation took place over the phone live on-air.
Union members are due to walk out from 21:00 GMT in a dispute over 950 job losses and closure of all ticket offices.