You should be standing at a lamppost, opposite the end of Buttercup Court.
A = The number on this lamppost
BC = The number on the nearest house, (which has blue garage doors)
The cache is at: N52 4B.0C9 W000 18.C8A
The Peterborough Rainbow is a series of 7 caches, each loosely linked to a colour of the rainbow.
Each contains information needed to find a final bonus cache: The Rainbow.
2 caches contain formulae for sets of co-ordinates (A) and (B). The others contain the missing numbers.
Don’t forget to write this down at each location!
"Jr pna'g tb bire vg .." 2 neebjf.