Does exactly what it says in the url- reportemptyhomes.com allows you to inform councils of empty and abandoned buildings. They have teams and powers dedicated to bringing empty homes back into use, but often just don’t know about properties they should be dealing with.
There are estimated to be over 840,000 empty homes in the UK and bringing even just a few of them back into use would save millions of pounds and cut the waste associatd with building new ones.