Basildon Sporting Village, Cranes Farm Rd, Basildon, SS14 3GR
However the postcode ss143gr takes you to the wrong place ...
Leave M25 J29 take A127 towards Southend.
After 7.2 miles branch left onto A176.
At Roundabout 1st exit A176 (goes under A127).
At roundabout 2nd exit on A176 (Upper Mayne)
At roundabout 1st exit on A1235 (Cranes Farm Road)
Pool is on right, you have to go past and u-turn at roundabout
Google map of area (pool on Cranes Farm Road side of Gloucester park grounds) : here