This is yet another example of the catalytic hysteria that causes all of these problems.
The law in this country may be strict but it is rarely ridiculous where it affects daily life. The law in terms of tools that may be dangerous is left vague to allow for sensible interpretation to allow people to use tools when there is or may be a need.
Saying a tradesman cannot carry a tool such as a leatherman for a job that only requires screwing a light fitting is ridiculous because that tradesman cannot foresee what jobs he will be doing for the rest of the day / week or repack his bag for every little job. The job may also change when he gets there, what is he to do? Return home for the correct tools? Presumably they can not be in his van as that would most likely be parked on school property, infact parked anywhere other than private land he would be committing an offence according to some in this tread.
If a tradesman or any other person uses a tool such as a knife often in the course of their work or other activity they are doing then they would be perfectly OK having it with them in their tool bag or person.
Also it is not within the law or people on here to tell a person how they should do their job, yes you can cut with scissors, it may be impractical, but somebody may just prefer to cut with a knife and if that choice would be deemed reasonable by learned people then there is no problem with that. Scissors are nothing more than two knives and a pivot point, what makes them so much safer? as a pointed bladed tool they fall within the exact same guide lines, it is only the image that people have painted of knives and scissors that sets them apart.
Additionally as British Red posted near the start, folding pocket knives under 3 inches are exempt which should have ended this thread there and then, in fact I would have to do some research around those sections but it appears to suggest a student is still OK to have a pocket knife like the good old days, meaning nothing has changes but peoples opinions causing all the modern restrictions we perceive and therefore impose on ourselves and others, and thus the tightening cycle continues.
We should all try to avoid turning popular opinion or hearsay into fact and passing it on as it only makes the problem worse
Stepping off the soap box..