Immortal Worcestershire Sauce?

Is Lea & Perrins Worcestershire Sauce really immortal? What brings this to mind is a BBC Food Programme radio show from some months ago. The topic was popular brands in Britain and there was a Lea & Perrins representitive claiming that this iconic sauce will never spoil and will only get better with age even if opened and stored without refrigeration.

He claimed the only reason there is a best by date on the label is a date is legally required.

Well, I found a bottle three years out of date and plan to use it tonight. If I survive, I will tell you how it turned out. Some claims just have to be tested.

Meanwhile, what do you think of this product claim? Fact or fanciful product fiction?