(2018, Rowan Atkinson, Emma Thompson)

Footage of Beachy Head includes a VERY tiny Seaford and District open topper on the Eastbourne tour, you'll have to click on the thumbnail to see it:

There's a contrived sequence where Johnny English in a VR headset mistakenly boards a passing open top AEC Routemaster and throws the tour guide off the upper deck. The bus in question is Ensign Bus RM371 (WLT371), suitably wrapped as a sightseeing bus. (thank you Steve Newman).