1973 was a landmark year for The Beatles. It was 10 years since they scored their first UK gold disc ('She Loves You') - ten years since the birth of Beatlemainia. A decade is a long time in pop music. Fashions come and go in the blink of an eye. Most pop stars are lucky to last eighteen months at the top. Yet, in 1973 The Beatles collected 13 gold discs between them (seven gold albums and six gold singles). Paul...