‘Joy Davies’s disappearance – and presumed killing – provides us with the most forensic evidence of all six of the Towpath Murders. There was a struggle on Julie Margaret. At least that’s what Rodney Beckinsale “found” when he returned to the boat – much later than he said he would. He blamed himself for “bumping into” his mates and going to the pub’.

Georgie Ellis smiled at Charlie, knowing how irritated he became when Felicity Harbord made exaggerated inverted comma movements with her fingers. Riggsy refused to respond. The ME continued, blissfully unaware of the silent messaging between the two coppers.

‘I’ve had a good look at the ME’s report from the time. It looks as though Joy hit her head on a cupboard in the ga...

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