s references: sheet 170-start 822024 finish 827031. start on factory service road at the vale of neath enterprise park, opposite toyoda-koki automotive factory, 4 meters east of lamp column ref 14. proceed eastwards to service road “t” junction. bear left and continue eastwards along service road to resolven roundabout (0.457 miles). take 1st exit left westwards on a465 dual carriageway to take slip road off at aberdulias (4.825 miles). follow the left hand loop to 1st rbt; take 1st exit to aberdulias interchange (5.356 miles). circle rbt to take 4th exit down on slip road to rejoin a465 eastwards (5.760 miles). proceed on a465 to resolven rbt (9.948 miles). take 1st exit, over riverbridge to finish at road sign on north side of bridge over river neath (showing b4242 left to aberdulais, right to glynneath). n.b. 51 yards before junction with b4242) (10.047 miles). please call out your number at finish if you are able to!