Conversation so far:
what radio station did Humphrey Lyttelton work for?
Lyttelton presented The Best of Jazz on BBC Radio 2
how long was Humphrey Lyttelton with The Best of Jazz program
From 1967 until April 2007, Lyttelton presented The Best of Jazz.
is presenting The Best of Jazz all that Humphrey Lyttelton did on the radio
In 1972 Lyttelton was chosen to host the comedy panel game I'm Sorry I Haven't a Clue (ISIHAC) on BBC Radio 4
what did Humphrey Lyttelton do in television
Did Humphrey Lyttelton work for any other stations besides bbc

Question: when did he start at BBC Radio 4
Self-contained rewrite: when did Humphrey Lyttelton start at BBC Radio 4