He was the first person to broadcast from London Weekend Television's new centre on the south bank of the River Thames, when it opened in 1971.
He was promoted to senior announcer in 1977 and stayed in this role until 1997 when he left the station to pursue a management consultancy career in the United States.
During this period, he became one of the youngest people on British television to present his own programme – Movie Magazine (the precursor to Cinema and Film Night) – an original idea devised by his father and Peter Duval.
Lewis was the station's first programming controller while his father was the first managing director and wrote the original proposal to the IBA for Metro and later for GWR in Swindon.
[citation needed] In 1977, Lewis was made chief announcer with LWT – a role which he remained until leaving the station in 1997.