Took a while to work out as the Sudoku's were indeed getting harder. I solved it first time but the co-ordinates it gave were taking me to somewhere miles away. I tried a second time and managed to solve the Sudoku with a different answer which thankfully made some very promising co-ordinates.
Drove over to Hanmer mere for a nice easy find. Another nice place and our first FTF in Wales .
Took one of the slips for the final cache and scratched my head for some time before admitting defeat and heading off for home.
Just cracked the puzzle (it's a real stinker of a puzzle and very tricky, but very rewarding when you do solve it ) so will probably dash out again in a minute to try and find the final cache.