First of all, sorry to all those paperless cachers who will need to print this one out.
All the picture clues have been doctored with a letter replacing a digit
The above co-ordinates are for the first clue (A) which is in the main car-park ( Open from Dawn to Dusk ).
After collecting A, proceed to N52° 30.990 W001° 40.142 where you should find B.
From here on, walk around the reservoir in an anti-clockwise direction,
keeping your eyes open for the other letters.
The clues are in order and if you get to the bat-house without all the letters,
you have gone too far!
Once you've collected all the letters,
you'll find the cache at...
N52° 31.ABC W001° 40.DEF
You are looking for an ammo box - good luck