There are three Fords in the area, from Droitwich take the Saltway then Goosehill lane, turn teft at the sign post marked "Shellford" you will come to a ford which has a picnic area and has a bridge which dates back to 17th Century, drive through the ford and turn left on to the next ford which holds a cache then left again to find this cache.
http://www.worcestershire.gov.uk/directory_record/3326/shell_ford_picnic_place
You will find this cache crossing the Ford through Seeley Brook but you will not need to walk through it. Please take care especially when the fords are swollen, its advisable when in flood not to go through the fords in this area.
You are looking for a small bison tube.
Mobile phone signal isn't great here so I made it nice and easy, once you get to the GZ it shouldn't be difficult.
Good luck and I hope you enjoy