I've found FRA security to be useless muppets. They took a double ended 4BA/2BA spanner from me - a piece of metal with no sharp edges and under 3 inches long! However, a pair of tweezers with sharp points 6 inches long passed without comment. They also wanted my belt removed. When asked if they took responsibility for my trousers coming down, they didn't know what to say.....I lost a lot of weight in hospital last year. Unfortunately, it's going back on - insulin and steroids are a great way to increase weight.