The co-ordinates will take you to a simple but colourful mural, from there you need to work out the coordinates for the final as follows.
The cache is at S43 33.ABC E172 38.DEF.
Use only the part of the mural that is on the side of the building that faces the street.
A= number of corner puzzle pieces (as in, number of pieces that would go in the corner of a jigsaw puzzle)
B= number of pink puzzle pieces
C= number of letters in the first word starting with S on the sign
D= number of letters in the word on the blue puzzle piece
E= number of letters in the word on the red puzzle piece
F= number of green puzzle pieces
Checksum: 24