Cliffe (sometimes known as Cliffe-at-Hoo) is a village on the Hoo peninsula in Kent, England, reached from the Medway Townsby a three-mile journey along the B2000 road. Situated upon a low chalk escarpment overlooking the Thames marshes, Cliffe offers the adventurous rambler views of Southend-on-Sea and London. It forms part of the parish of Cliffe and Cliffe Woods in the borough of Medway.
In 774 Offa, King of Mercia, built a rustic wooden church dedicated to St Helen, a popular Mercian saint who was by legend the daughter of Coel ('Old king Cole') of Colchester. Cliffe is cited in early records as having been called Clive and Cliffe-at-Hoo.
Opposite the sign you will see a telegraph pole and on the back of this is 5 numbers A B C D E (note you do not need to multiply the number)
To find the cache you need to work out the following sum
N51 26. (B*C*B) (D - (C*B) (B+C+E+C+A)
E000 29. (D+B) (C+B) -A) (E/E) + D+A)