American artists came to Britain during the second world war, the US army and Air force as well as the AmericanForcesRadio broadcast Jazz and Swing across the UK
Whilst in he late 50's American rock found its way into England with Elvis Presley - groups like the Beatles and rolling stones replaces skiffle and American blues with their won rock sound and from 1963 onwards invaded America with British pop music
British music stared separating from American and formed new groups like the Mods and Rockers and Glam rock
British music found its own identity with creating defining looks for different music styles - Glam rock challenged gender identity with artists like DavidBowie and Marc Bolan
in the late 70's Punk emerged with its own identity and style - tore jeans, piercings, spiked hair
Big change from the 1920's with blues, jazz and swing to the 1970's with the more offensive and aggressive music and look of punk and rock