Start at the Podimore roundabout and head for Langport up the A372. This section is really fast and fun. Some lovely sweeping bends ( although a fair size chunk is signed as 50) Just before Langport you arrive at Huish Episcopi. Head through the town/village and towards Langport. Just as you arrive in Langport there is a petrol station on your right. Turn right straight after the petrol station. As you leave Langport there are some really fun tightish bends with some interesting changes in elevation. Visibility isn great but it is certainly fun. The real gem of the route is about a mile after you leave the village of Aller a few miles outside Langport. Locals call this stretch of road 7 bends. The clues in the name! about a quater of a mile of constant left/right swapping. Guaranteed knee down stuff! If you hit it without traffic it is a stretch of road youll not soon forget.(watch out for the jump just after!) From there on follow signs for Bridgewater. More fun twisties all the way in.
A nice blast down from Winchester to Petersfield. I heard that police presence has been increased on this route after a biker got busted at nearly 140mph, not sure if it's true, but might be useful to be aware of this fact.