Initially, instrumental roles were flexible, with Boon Gould also playing bass guitar and saxophone and Lindup doubling on keyboards and drums. Mark King was primarily a drummer (although he also played guitar) but had recently sold his drum kit to pay for transport back to the UK after an ill-fated European venture. With Phil Gould and Boon Gould established (respectively) as the most accomplished drummer and guitarist in the quartet, King opted to learn bass guitar instead. At the time, King was working in a London music store. A notably flexible musician and quick learner, he had observed visiting American funk players demonstrating the thumb-slap bass guitar technique and developed his own take on the style in a matter of weeks.