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A lament for dementia and a love story of May-December friendship, the least interesting thing about Harold’s Going Stiff is that it also happens to be a zombie movie.

Shot in Sheffield on a shoestring, Keith Wright’s impressive horror uses a mock TV-doc format to follow ‘patient zero’ Harold Gimble (Stan Rowe) as he descends into zombieism; Rowe and Sarah Spencer, as Harold’s care assistant, Penny, are exceptional as the leads.

Comic relief tinged with vigilante menace and gags about Battenberg punctuate Harold’s terrible, inevitable decline, which achieves King Kong-sized pathos. Dead good.