We have c30 million Title boundaries (we call them polygons) within Nimbus, but sometimes land is unregistered so there is no Title outline to show.
We represent this unregistered land as either orange or yellow pins - yellow means the site has planning connected to it, which in most cases includes ownership details. Wherever possible we include the address, so at the least you can write to them or research that address further.
However, there are cases where even the Land Registry does not have a Title for a site/property. This means, if there is no unregistered land pin, there is little we can do and contacting the Land Registry themselves is your best option. Call: 0300 006 0411