Unit 11, Trade City
Ashton Road, Harold Hill
From M25 heading anti-clockwise, come off at Junction 29 and take the A127 signed for Romford. Carry on along road for approx 3 miles, at which point you will come to a flyover. Stay left of the flyover and approach roundabout. Take the 4th exit onto the A12 heading East, turn left at the traffic lights. Turn left at small roundabout into Ashton Road, Screwfix is on left after approx 300 meters.
FYI. (If cars are coming from Junction 28 off the M25, then the above should apply from the point of approaching the flyover).