See in this case I think he WAS covered!
TYPICAL TRO EXEMPTIONS:
Nothing in Articles 7 to 12 shall render it unlawful to cause or permit any vehicle to
wait in any of the roads, lengths of road or on the sides of road or loading areas
specified therein for so long as may be necessary to enable:
- the vehicle, if it cannot conveniently be used for such purpose in any other
road, to be used in connection with any of the following operations, namely:-- building, shop fitting, industrial or demolition operations;
- the vehicle, not being a passenger vehicle, if it cannot conveniently be used
for such purposes in any other road, to be used in the service of a local
authority or its contractors in pursuance of that authority's statutory powers
or duties; - the vehicle of the Royal Mail or other universal service provider (as defined in
section 4(3) and (4) of the Postal Services Act 2000) to be used for the
purpose of delivering and/or collecting mail; - in any case where the person in control of the vehicle,
- is required by law to stop;
- is obliged to stop so as to prevent an accident, or
- is prevented from proceeding by circumstances outside his/her control;