We were already banned from using ones that didn't automatically retract after use under "Health and Safety". They weren't just the ones where you can click the blade back in after use, you actually have to hold your thumb on the push button and hold the knife out, they are prung loaded to retract as soon as you let go.
Ironically we've all switched to using scalpels which are far more dangerous.
I hear HSE are considering bringing out legislation to replace hammers with ones made from felt. That way, when you hit your finger it won't hurt as much. :evil: