The Cache is not located at the listed coordinates, but a clue to its location is.
Frank Roberts was Lord Mayor for one term from 1952-1955.
This park named in his honour is a nice spot to play a game of cricket, climb some trees or have a BBQ with some friends.
There is a clue at the listed coordinates that will lead you to the final location.
Watch out for aggressive birds during nesting season,
a wide brimmed hat is definitely in order.
Congratulations to Crooked Pete, Que Sera and Bear0503 on the joint FTF