The adventure follows the Manor Farm Park https://www.bvt.org.uk/wp-content/uploads/2021/08/Manor-Farm-Park-Heritage-Trail-Leaflet-Update-Spring-2021.pdf I suggest you follow it in order so that you don't have to retrace steps for the bonus cache.
Opened to the public in 1951, Manor Farm Park was originally the grounds of Northfield Manor House.
The park comprises around 50 acres of public open space with woodlands, meadows and a lake.
Although a relatively recent public park, the landscape has a much longer history. In the Middle Ages it was owned by the Earls of Dudley, lords of the manor of Northfield. The Dudleys constructed nearby Weoley Castle as the main hunting lodge for their local estates.
A farm was recorded on the site in the 18th century. Traces of medieval ridge and furrow and an ancient hedgerow dating back to the 16th century survive.
The Manor House washome to the Quaker philanthropists George and Elizabeth Cadbury between 1894 and 1951. After George died, Elizabeth continued to live there until her own death at the age of 93 in 1951.
For much of its history the landscape surrounding what we now know as Manor Farm Park was predominantly rural. However, the area experienced extensive development between the two world wars and by the 1950s it had become a substantially populated suburb of Birmingham.
In 1951, on the death of Elizabeth Cadbury, the park was gifted to the City Council (who hold it in trust) and the Manor House sold to the University of Birmingham.
To find this cache:
Using the information you have gained from the adventure lab
N52 25.(A-5) B C
W1 57.(D+1)/2 (5E-5)