According to Fred HOYLE (24), SPACE is ‘only an hour’s drive away if your car could go straight upwards’ (10 13 37 and extra letters in clues). Cars fulfilling this condition are at 5, 6, 16, 21 and 33.
 
First prize Caroline Arms, Annapolis, MD, USA
Runners-up Barry Roe, Wigston, Leicester;
B. Taylor, Little Lever, Bolton