From Hertford, take the A414 to the A10, then travel south, leaving the A10 at the Hoddesdon turnoff.

At the end of the slip road turn left onto the link road, then straight across at the roundabout, following the signs to Broxbourne.

At the next roundabout, turn right, still following the signs to Broxbourne on the A1170.  Continue on this road, across another roundabout and past a Sainsburys supermarket and petrol station on your right.

The A1170 will take you out of Hoddesdon and into Broxbourne (about a couple of miles).

At the traffic lights, turn left into Station Road, following the signs to Nazeing.

Continue past Broxbourne Railway Station, crossing the bridge with a bend on it and the entrance to Broxbourne Riverside.

Nazeing Glass is on the left, immediately after crossing the bridge over the River Lee.

There is plenty of free parking on the site.