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Shared credits
David Sherwin averages 6.67, Peter Jeffrey averages 6.69. Apart that suggests 6.68; together they average 6.67, a lift of −0.01.
Lift is the average of their films together minus the mean of their two career averages.
Dot size shows audience votes; lines are rolling five-film averages. Films below the source vote floor are left out.
 if.... | 1968 | 7.0 | 442 | Writer | as Headmaster |
 O Lucky Man! | 1973 | 6.8 | 122 | Producer, Writer | as Factory Chairman / Prison Governor |
 Britannia Hospital | 1982 | 6.2 | 74 | Writer | as Sir Geoffrey |
