Danger Asbestos Sign / No Unauthorised Persons Beyond This Point Sign /Do Not Cut, Drill, Saw, Break or Disturb In To This Area Sign Is Prohibition Sign is available in two different sizes. This sign can be on self-adhesive vinyl or on foamex board, choices of 3mm, 5mm thickness. All the signs in this section conform to the Health & Safety Signs and Signals Regulations - BS 5499-1.