A listed building enforcement notice works in a similar way to a standard planning enforcement notice, but it applies specifically to unauthorised works on listed buildings.
Unlike normal planning breaches—which can become immune from enforcement over time—unauthorised works to a listed building never become immune, regardless of how long ago they took place. This is particularly important for anyone taking on a listed property; you should ensure that all past works were properly authorised or did not require consent.
It is also important to note that carrying out unauthorised works to a listed building is a criminal offence, irrespective of whether a notice has been served.