-
Possibly to dig a hole as this is a possibility due to the high radon gas in the area, a radon sump might be needed. Yap the current owners have never done a test and nothing has been done about it and they have 2 yong kids!!!
IIRC Radon is one of those things that sounds scary but really isn't when you get into it. Even if you double the chance of a rare thing happening it's still very rare.
I think as long as the kids aren't heavy smokers they will be fine. I certainly wouldn't be paying the Radon industry £xx k to install a woo-woo box.
Our place in SE23 has a side access which was registered in the names of some untraceable people with an address in North London. They were possibly the successors to the owner of the land when the area was developed in the late 19th and early 20th century. It was one of many such alleys in the area which would have been used for delivering coal, but most have been blocked off by people extending their gardens. We accepted the uncertainty on the basis that there was probably sufficient history of use for us to rely on. I ended up doing most of the bramble control. But yes, see what the solicitor comes up with, and be ready to accept some uncertainty.
Our current place has an even worse issue - our title stops at the threshold of our front door and “our” front yard is unregistered.