27 February 1964

The Derbyshire farmer - who became a household name with appearances on discussion programmes such as Any Questions? and panel games such as Ask Me Another - was surprised by Eamonn at the BBC Television Theatre.

13 February 1974

In one of his more elaborate disguises, Eamonn dressed as an astronaut to surprise the astronomer and broadcaster - perhaps best known as the presenter of the BBC Television programme The Sky at Night.
The magician David Nixon and the entire Selsey Cricket Club team are among those paying tribute to Patrick, who lived in the seaside town in West Sussex.

10 December 1975

The scientist, writer and presenter - well known for the frantic waving of his arms - was surprised by Eamonn at a discotheque at the London headquarters of the National Association of Youth Clubs. Magnus made regular appearances on ITV's science programme Don't Ask Me, and his fellow presenters from that show, Miriam Stoppard and David Bellamy join the tribute.

31 March 1976

Percy - for many years the leading voice of British gardening on television and radio - was surprised by Eamonn at the Ideal Home Exhibition in London's Earls Court.
Guests include his colleagues from the BBC children's television programme Blue Peter - Lesley Judd, Peter Purves and Shep the dog.

20 December 1978

Eamonn surprised television's popular botanist in the foyer of Thames Television's Euston Road Studios.
David - who is also an author and an active environmental campaigner - was a regular expert on many television programmes, including Don't Ask Me, alongside Magnus Pyke - who is a guest on his tribute.

13 February 1985

The astrologer - who rose to national fame though his Your Stars spot on BBC's Breakfast Time television programme - was surprised by Eamonn - hidden inside a large cake - on London's Embankment.
A very showbizzy guest list includes impressionist Faith Brown, actress Pat Coombs and comedy dancers The Roly Polys.

27 October 1997

Michael surprised the inventor - best known for creating the wind-up radio in response to the need to communicate information about AIDS to the "people of Africa" - at Canada Gate outside Buckingham Palace, following Trevor's investiture of his OBE. Among those paying tribute are broadcasters Sue Lawley and John Humphrys.

9 February 1998

Bill - who had led BBC Television's Met Office weather forecasting team since 1983 - was surprised by Michael while filming for The Weather Show at the Thames Barrier in Woolwich, London.
A host of weather presenters, past and present, were among those paying tribute, as well as renowned cricket umpire Dickie Bird.

18 January 2002

Michael gatecrashed the annual Slimmer of the Year awards at London's Kensington Roof Garden to surprise the author and broadcaster, who, as founder and president of her own Diet and Fitness Club, is one of Britain's most successful businesswomen.
Rosemary's guests include broadcaster Terry Wogan and singer Cliff Richard.

3 April 2002

Henry - an old colleague of Michael from his other presenting job on BBC television's Antiques Roadshow - was surprised while talking to journalists at Bonhams Auction House in London.
The notable authority on Royal Worcester porcelain was greeted by, among others, broadcaster Angela Rippon and the former Prime Minister, Sir Edward Heath.

10 April 2002

The interior designer and television presenter was surprised by Michael while on location in someone's back garden for the popular BBC television series Changing Rooms.
Linda's guest list includes her fellow designers from that show, including Graham Wynne and Laurence Llewelyn-Bowen, as well as the show's presenter Carol Smillie.

2 January 2003

Television's prominent antiques expert was surprised by Michael in Folkestone while filming a special edition of his BBC programme Bargain Hunt for Children in Need.
Guests paying tribute include Countdown's Carol Vorderman and Richard Whiteley and fellow antiques expert Tim Wonnacott.