Well I don't know about anyone else but a few months back I bought a house and it's precisely because I checked all the underlying documentation that the sale took months to complete, because I discovered that while the previous owner did get planning permission for their adaption, they never got the completion certificate. So we waited until they sorted that all out with the council before completing. You can bet bottom dollar I checked that the deeds were correct, the 89 page mortgage agreement was what we expected, the planning permission matched the completed work, the completion certificate was uploaded, the lot.When was the last time you ordered a service from a professional, did you personally verify all the work that they did?
Being a landlord isn't something you can just pass off to somebody else and absolve yourself of all legal responsibility. At the end of the day you remain the landlord.
Yeah it's not really a sackable offence but I don't think it's some mild transgression, particular when we have enough dodgy landlords not fulfilling their legal obligations and she's the chancellor of the country. If you're too busy in your day job to have a landlord side hustle, don't hand a landlord side hustle. It's not an excuse.