Exit the M5 at junction 12, onto the B4008 for Stonehouse.
Turn left at Little Haresfield.
After 50 yards turn left to Haresfield/Brookthorpe.
Continue to T-junction, then turn right. Follow this road for 2 miles to Brookthorpe.
At T-junction turn right onto A4173 for Stroud.
Climb hill for 2 miles to Edge, and after Edgemoor Inn take second turn on left into Wragg Castle Lane.
Barncastle is located on the right hand side, before Wragg Castle Farm.