When examined by BBC Radio 4's Document programme, the format, language and tone of the documents all rang true, but establishing whether they were genuine was not simple: MI6 never discusses its operations or declassifies files and all the people named are dead.

BBC: The 'secret agents' of the UK press

The format of the programme was changed to 'Sounds Like Saturday Night' and this gave Dave a bigger reach with his musical knowledge to include the 50's, 60's, 70's, 80's and beyond.

BBC: Presenter profile: Dave Swanton

Thames Television, which makes the programme, has been asked to come up with different ideas on how to refresh the format.

BBC: This is Your Life faces axe