(BBC) - Philip Moulin intently studies the label on a bottle of expensive wine with a magnifying glass.

He then shines a blue ultraviolet light at the bottle, before picking it up and weighing it in his hands.

"Counterfeit bottles can often be much lighter," he says.

Mr Moulin is standing at his workbench at the main warehouse of UK wine merchant Berry Brothers & Rudd (BBR).

A cavernous facility in the Hampshire town of Basingstoke, more than 2.7 million bottles of wine are stored there at a constant 12C, stretching from floor to ceiling in endless rows.