John and Paul's show of solidarity was a measure of the outrage felt about Jagger and Richards' imprisonment.
The band's first studio album of the 1970s was 500 days in the making, and worth every one of them.
The night before he and Linda exchanged vows, Paul was working with George Harrison at Apple's basement studio.
The band remember the album that, for many disciples, remains their defining hour.
The bands that recorded at Olympic Studios reads like a who’s who of popular music - The Beatles, Stones, Zeppelin, Queen, The Who, U2 - all worked there.