Visited a few times in 2011 and 2012. When, as an explorer, you talk about what there is to explore underneath Bristol, Dreadnaught is always mentioned. It's very unique in design, and very big. It goes on for miles, with a lot of walking involved to see it all.
Rednaught Storm Drain, Bristol
Visited September 2012. Rednaught is often confused with Dreadnaught, but it get's it's name from the red bricks used to build it. This one is one to watch out for the tide in, I was wearing wellies, and was a few millimetres away from having wet feet, very very quickly.
We tried CDS last year, but got there literally as it had just been sealed again (can't think why...) so we had no luck. Over a year later, we were nearby and having heard only the day before that someone else had been down, we knew we'd have some luck.
On one of our many nights in London in 2013, this was suddenly on the agenda. As we approached the manhole, we realised it was already ajar, and music was coming from inside. Turns out we were late to the party!
Quite possibly the single most awesome place I've ever been. A miniature mothballed railway system that runs under central London, which closed in 2003. The Post Office's own scalextric.
Visited in September 2012. This was a permission visit, it's the only way to do this place now, without a large amount of damaged being caused. But it's worth it, seeing as you still get to see everything it has to offer, and get taken round by a very knowledgeable guide.
Visited in December 2012.
Notes: Visited with: the kwan, Xan Asmodi, Landsker, whodareswins, cunningcorgi, wonkycows, dangerousdave, OT, Styru, SarahSaw, urban junky, tommo, Phyllis Neptune, Tucker.
Ventured down in early 2014.
Shortly before this one was 'sealed', we decided that it was about time we went and had a look, seeing as we live so close yet had never given it the time of day.
This would probably have to be up in the top ten places I've explored. I just find it incredible how something like this sits below the busy city of London, yet so few people actually know it even exists, let alone what it looks like...