After the last cache at the fishing lakes, continue along the public footpath over a small bridge over a stream and at the junction, turn left towards Tonbridge Park. After passing under the main railway line, you are into Tonbridge Park. Continue along the footpath and you will soon come to a small girder bridge over a stream.
This cache is on the bridge - but where ?
After this cache, follow the path and you'll come out where Tonbridge Rugby club and swimming pool is.