Take the frequent Airport Flyer bus service to Bristol Temple Meads rail station@
http://flyer.bristola..._from_bia_mon_fri.php
(£6 single, £10 return)
Then take a train to Cam & Dursley station (which is actually in Draycott!)
http://www.networkrai...metables/Table134.pdf
(£5.90 single, £10.70 peak return, £6.80 off-peak return)
From there. there's a very limited bus service (No 311) into Dursley, taking 11 minutes, with departures as follows:
Mon-Fri: 0810, 1011, 1212, 1411, 1613, 1823
Sat: 0810, 1011, 1212, 1411, 1611, 1811
(No Sunday service).
Alternatively, call a cab for the final part of the journey. (Dursley Taxis are on 01453 347 021, Jenkins Taxis on 01453 542 346 and A2B on 01453 548 483).
Chris