Access is arranged by asking for permission at the shire horse center, they still use the water for the farm. You need to cross their land and over a fence.
The entrance is the back of the reservoir, water flows all year round and can be quite high after heavy rain.
The caving is fairly easy and short to the sump. Its been about 4yrs since I was there last, lines were in reasonable condition and early sumps are easy, a minor constriction at the start of sump 1 but nothing difficult.
Mike Barnes spent a lot of time digging at the terminal point, I believe he was the last person to have a serious attempt.