On 13 June 1970, five days before election day,
Radio North Sea International changed to
Radio Caroline International and launched a campaign in support of the Conservative party. The name change and political campaign were supported by
Radio Caroline's founder
Ronan O'Rahilly. Listeners were told that their freedom to listen to the radio station of their choice was under threat and that, if the
Labour party were returned to power, the station would close: their vote should therefore be
Conservative, the only party that supported commercial radio.
Ronan O'Rahilly headed the campaign on land, using a double-decker bus and posters depicting
Harold Wilson as China's
Chairman Mao.
[3]
They believed the Conservatives would end jamming. Conservative policy was to establish
local land-based commercial radio
in the UK.At a Fight for Free Radio rally the weekend before the
election, Conservative loudspeaker-vans urged 'Vote Conservative and
fight for free radio'. The Conservatives won and there is evidence that
the
Caroline and RNI campaigns made a difference to the result.