 Visitor access is via the main entrance on the B3128 road , which can be accessed from the M5 motorway following the signs from either junction 19 or 20 . Free parking is available 50 metres ( 160 ft ) from the Home Farm Visitor Centre and ticket office . The nearest train station is Nailsea and Backwell , which is just over 2 miles ( 3 @.@ 2 km ) away . A frequent bus service runs from Bristol Bus Station . 
