There are four stages before getting to the cache.
First stage : posted Co-ordinates
Take information from site as described below
Last digit re Cork = A
Second Stage: ninth digit of phone number on teal coloured shed = B
First digit of same phone number= C
Third stage : Third row re Goldsworthy Gurney second digit = D
Fourth stage : original lifeboat station / blue plaque first digit of year = E
Second digit of year minus third digit of same year = F
The cache can be found :
N 50° 49.A B C W 4° 33. D E F
CHECKSUM OF A B C D E F = 18
PLEASE NOTE. Final location may be hazardous for young children - needs great care at latest stage of search