This is fan service as painstaking as any Marvel installment, and you’re expected to bring your well-studied knowledge of deep bench characters and all your reserve emotional commitment with you. As a reward for those loyal fans, Downton Abbey offers an envelopment in gorgeous and exacting period detail.

Downton 2.0 is literally bigger, broader, more gem-encrusted, punctuated with more drone shots and monarchist pomp, and has all the major cast members back in place.

The plot of the Downton Abbey movie is brilliant, not so much because it is surprising, but because it allows every member of the cast to do what we expect of them.

Every scene here feels as if it begins with a grenade being thrown into a room, leaving one to wonder how it will be diffused, and after a while, all you see are the gears of various sublots turning separately until they mesh together and move in unison.

The plots are rickety and the characterisation has the depth of a Franklin Mint plate, but there are some funny moments and Kevin Doyle, playing the overexcitable servant Molesley, pretty much steals the entire film.