Possible Clues:

• Typo
• The Grauniad's road race?
• Proofer's find
• Literal speed on motorway
• Possibly the wrong character to shoot beside motorway
• Untrustworthy black-and-white statement
• Typographical error
• Being awfully prim isn't a character fault
• Character fault one's shown in mile race
• It's grand before I run, but in error