Pick of the Pops, as the chart was originally known, transferred to Radio One from the BBC Light Programme in October 1967, along with host Alan Freeman. Tom Browne took over in 1972 with Solid Gold Sixty. This consisted of two hours featuring Radio One playlist tracks which were not in the Top 20 (broadcast on 247 metres Medium Wave and carried on VHF by some location BBC radio stations), followed by a one-hour Top 20 rundown from 6pm - 7pm (carried also on BBC Radio 2's FM transmitters). Starting from March 1974,[3] the playlist tracks were incorporated into Paul Burnett's 'All There Is To Hear', and the Tom Browne show was reduced to just the Top 20 for one hour at 18:00.

The OCC website contains the Top 100 chart.[5] Some media outlets only list the Top 40 (such as the BBC, with their Radio 1 show following the lead of Casey Kasem's American Top 40 in the 1970s) or the Top 75 (such as Music Week magazine, with all records in the Top 75 described as 'hits') of this list. The chart week runs from 00:01 Friday to midnight Thursday.[6]




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