The walk starts at 6.30 p.m.

Take the A603 from Cambridge towards Barton.  Cross the M11 and go past a right-hand turn to Comberton/Toft.  Immediately after the 40mph speed limit changes to 30mph on a right-hand bend, turn left into a large layby.  There is no ‘P’ sign.  It is just before the Wallis garage on the left (p/code for garage CB23 7AW).