No.
They did, but the law wasn't enforced.
Bernstein in London - 1976 TV was released on: UK: 1976 USA: 1976
Dickens of London - 1976 is rated/received certificates of: Australia:PG
London SS ended in 1976.
Dickens of London was created in 1976.
London Sounds Eastern was created in 1976.
Bryce London was born on October 13, 1976, in USA.
Dickens of London - 1976 Mask 1-1 was released on: UK: 28 September 1976 USA: 28 August 1977
In Search of... - 1976 The Tower of London Murders - 6.9 was released on: USA: 9 November 1981
Nature and Time - 1976 was released on: USA: 1976 (Los Angeles, California) UK: 1 August 1976 (London)
In Search of--- - 1976 The Tower of London Murders 6-9 was released on: USA: 9 November 1981
The cast of Bernstein in London - 1976 includes: Leonard Bernstein as Himself - Conductor William Warfield as Himself ("A Lincoln Portrait" narrator)
Carry on England - 1976 was released on: UK: 31 October 1976 USA: 19 November 1976 France: 1 December 1976 Austria: 10 December 1976 Spain: 17 December 1976 Bulgaria: 7 January 1977 Portugal: 24 July 1980 Germany: 11 November 1993 (TV premiere)