Big thumbs up from me!
Your report inspired me to a visit with Mrs Kevinr. Thanks for giving me a great romantic day out with the wife!
Just to input my thoughts on the ladders: the ladder that leads into the smaller reservoir is very suspect. It wobbles, is rusty and the top anchors look very dodgy and ready to fail. I used a climbing rope/harness and was belayed down by Mrs Kevinr - I would advise others to play it safe to.
The ladder going into the bigger reservoir is sound.
To identify which is which, the inclined ladder is to the big reservoir, the fully vertical one is to the smaller reservoir.
Thanks