Golden Gates in Warrington

I was in Warrington doing an Adventure Lab cache (type of geocaching). 
I remember searching for and finding a nano cache on these gates a fdew years ago - a nano is smaller than a thimble. It was black. Not easy!
The adventure lab cache meant a nice stroll with 5 different venues to visit and landmarks at each. I found a puzzle geocache as well. It was baking hot and really muggy, then it clouded over and felt stormy but nothing materialised unless you count the sun coming back out.