In 1954, the existing big top was replaced by one with a capacity of 6,000 seats, a hippodrome track around the ring, and a grand entrance hall allowing spectacular parades to take place.

This led to regular Christmas shows on the BBC, including the 1977 Royal Jubilee Big Top Show, organised by his son David Smart, which was attended by Queen Elizabeth II and the Duke of Edinburgh, and raised several million pounds for charity.

The Windsor Safari Park was brought to fruition by his sons, Ronald, David and Stanley (known as Billy Jr), after his death, and grew to attract up to 2.5 million visitors per year.

[citation needed] He was the subject of This Is Your Life in 1956 when he was surprised by Eamonn Andrews at the King's Theatre, Hammersmith, London.

[citation needed] Billy Smart died in 1966, in his caravan shortly after conducting a band in front of his circus tent at Ipswich.

First ever Billy Smart’s Circus appears at Southall Park with Tommy Handley & starts BBC Radio series I.T.M.A.

1956/7 Billy Smart is the subject of ‘This Is Your Life’, a BBC biography programme, presented by Eamonn Andrews.

Birma, the favourite of the Smart family’s 20 elephants, walks over Jayne Mansfield and Tommy Steele.

1960 'Spinners of the Big Top', devoted to the Billy Smart show and written by Pamela Macgregor Morris, is published.

BBC award Billy Smart’s Circus the 'Silver Camera' for being the first programme ever to attract 20 million viewers.

Mrs Billy Smart receives a standing ovation at charity circus performance staged at The Royal Albert Hall in aid of National Society for Mentally Handicapped Children.

Hollywood actress Joan Crawford joins Billy Smart’s Circus for production of the film ‘Berserk’ and does guest ringmistress appearances.

1967 BBC Two broadcast the first ever colour programme on British television: a special production of Billy Smart's Circus.

Smarts continue to record 3 annual circus specials for BBC from Winkfield, near Windsor, UK.

Her Majesty Queen Elizabeth II attends Gala TV performance in the Smarts’ Big Top in Windsor.

Performers in this show and other Billy Smart productions, over the years, include Elton John, The Two Ronnies, David Frost, Stanley Baker, Harry Secombe, Olivia Newton-John, Telly Savalas (Kojak), Bobby Moore (England football captain of world cup winners in 1966), Dorothy Squires, Mike Yarwood, Leo Sayer, Gladys Knight & the Pips, Bruce Forsyth, Lulu, Moira Anderson, Charles Aznavour, Pat Boone, Sacha Distel and David Essex.

1981 The Airey Neave Memorial Trust (https://www.aireyneavetrust.org.uk/) Thames Television Billy Smart’s Variety Show, with contributions from Margaret Thatcher, UK Prime Minister at the time.

Estimated that total of 1 billion+ viewers of Billy Smart’s television shows, in UK and around the world, by this time.

In 1969 Princess Margaret (sister of Queen Elizabeth II of England) opens Windsor Safari Park, on behalf of the Smart family.

One time, Smart cousins were singing “Hey Jude” in the ballroom of the main house, when The Beatles, as a surprise, walked in.