Mark Acheson and Tom Heaton made 4 films together, and the 3 rated ones average 5.73, 0.20 below their career marks. The best is I'll Be Home for Christmas at 6.0.

Mark Acheson averages 5.80, Tom Heaton averages 6.07. Apart that suggests 5.94; together they average 5.73, a lift of −0.20.

Lift is the average of their films together minus the mean of their two career averages.