Which producer / engineer did McCartney invite to contribute to the recording ?
Studio Two , EMI Studios , London ( 3.30pm-6.20 pm ) Recording * " You 're Going to Lose That Girl " ( Lennon / McCartney ) ( takes 2-3 ) Personnel * Musicians : John Lennon ( rhythm guitar , vocals ) , Paul McCartney ( bass guitar , vocals ) , George Harrison ( lead guitar ) , Ringo Starr ( drums ) * Production staff : George Martin ( producer ) , Norman Smith ( engineer ) , Ken Scott ( 2nd engineer )