BTW it was a an outdoor Crown Green Bowling club not a 10 pin bowling club. The photo in the link is a bit misleading.

The Leatherman isn't legal because the blade on the Leatherman is locking and some blades are greater than 3 inches long. Even if David Leggat was carrying a Leatherman tool, the chances of him being stopped and searched by the Police is about zero in Aberdeen. Now if was in the habit of wearing a Burberry baseball hat and dressed like a NED then he might be stopped and searched.