The heavy inclusion of the Warrens is perhaps the biggest change the filmmakers made in adapting the Enfield story. According to The Telegraph, Ed and Lorraine did, indeed, investigate the events of the Enfield haunting. Even so, their involvement in the case seems scarce at best.
There's no explicit mention of the Enfield case on the couple's official website, and many iterations of the story barely mention them at all. The Daily Mail does not note their involvement, and in her various interviews, Janet doesn't seem to pay particular attention to their being there as well. So, while they may have looked into the spooky occurrences, they certainly don't seem to have defeated the evil that clearly dwelt therein.
As a matter of fact, the evil presence can still be felt in the house to this day. The Daily Mail tells the story of a family who stayed only two months. In addition to the unsettling feeling of being watched at all times, one of the children claimed to see the manifested figure of an old man walking into his bedroom. They left the next day.
The house is reportedly occupied today by a family that wishes to remain anonymous. The mother says her children aren't aware of the home's infamous reputation, and she's keen on keeping it that way.
