The walk is made longer by Charles, whose well-meaning, irritating diarrhetic ramblings border on grating.

Im a private person, says Herb.

I know, says Charles.

Sands Film Festival opening-night film

Carey Mulligan and Tom Basden in ‘The Ballad of Wallis Island’Alistair Heap/Focus Features

So, what happened?

It wont be Glastonbury, he says cautiously.

Less than a hundred.

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Herb takes it all in his stride.

Charles is transported when they rehearse in front of him: Theyve still got something special.

And Im not just talking music, he says.