From A27 take the A2030 (Drayton, Portsmouth) exit and follow signs for Portsmouth.
You will very soon cross a bridge onto Portsea Island and have the water on your left.
Stay on this road, the speed limit will drop from 50 to 40 mph, then drop again to 30mph.
Get in the left lane at the Good Companions Pub (on your left) traffic lights and stay in this left lane.
At the next set of traffic lights turn left onto Milton Road and follow this road.
You will pass over a mini roundabout then another set of traffic lights, then a pedestrian crossing.
At the next set of traffic lights turn left into Bransbury Road. You will see Bransbury Park about 200 yds on the left.
Sat Nav PO4 9JY