Campaign Records was a DIY label. It managed at least one singles In the run-up to the 1970 general election. Campaign Records put out a single containing an excerpt from a speech from Edward Heath on one side and a novelty vocal number called 'Little Steam Engines' by Ernest Wilson & His Orchestra on the other.  The two sides weren't as unconnected as at first they seem to be: Heath quoted an old speech by Harold Wilson in which Wilson had said that what Britain needed were a lot of one- or two-horsepower steam engines; while the song pointed out that steam engines had had their day.  The record was numbered SDR-9007; given Ernest Wilson's involvement the 'SD' may well indicate that it was made through his Silver Dollar Record company.  It was a British Homophone pressing, and the record came in a picture sleeve which gives the company's address as 1, Jermyn Street, London SW1.  It issued singles in an SDR-9007 numerical series. Thanks to Robert Lyons For The Info.

70 Edward Heath Excerpt From A Speech From Edward Heath CAMPAIGN SDR 9007