What a great letter! It was printed under the headline, "It’s time for airport security to ketchup with reality" The end says it best:
...Had the first officer smuggled a similar-sized bottle of ketchup through security, the liquids could have been combined to produce a potentially lethal barbecue marinade.
I consider the 10 minutes that the security team at Glasgow devoted to publicly and loudly confiscating this item from my bag to have been another minor victory in the "war on terror".
Thank heavens we are keeping our eye firmly on the ball.