I guess Sector Who, gave a clue to the answer of your question in paragraph 3 of his post.
With regard to "other airports don't & its not a problem repeat NOT a problem" in your earlier post it appears there was at least one case, which to the CAA to issue a Notice to Aerodrome Licence Holders.
The full datails are to be found at
www.caasrg.co.uk then Search for notal 1/98
