Hard shoulder (where present). You MUST NOT use a hard shoulder except in an emergency or if directed to do so by the police, traffic officers or a traffic sign.
Hard shoulder (where used as an extra lane). The hard shoulder is used as an extra lane on some motorways during periods of congestion. A red ‘X’ or blank sign above the hard shoulder means that you MUST NOT use the hard shoulder except in an emergency.
You can only use the hard shoulder as an extra lane when a speed limit is shown above the hard shoulder.
Where the hard shoulder is being used as an extra lane, emergency areas are provided for use in an emergency (see Rule 270).