Are you a landlord? You have out of date views of the law. The landlord can NOT just enter. You can even as a tenant refuse entry when they HAVE given 24 hours notice. It's actually very much in favour of a tenant with regards to access.
Sigh.
What I said was that the landlord, under certain circumstances, has a "right" to enter. And he does. The issue is how he enforces that, and whether the specific circumstances justify it. The LTA grants a right, and the Housing Act embeds an implied term in tenancy agreements. Many tenancy agreements also have an explicit clause.
If, in the past, access has been granted after notice, then the landlord is quite entitled to follow a course of dealing, and enter in the tenants absence. They have a "legal" right to do so.
Also, if the reason and circumstance of the required entry meet either LTA terms, or explicit contract terms, and are reasonable, then a landlord can go to court for an injunction. If the landlord's actions are reasonable, then it's likely an injunction will be granted and as the tenant is in breach of contract, is likely to get costs awarded against them.
However .... as I said in my original post,
The landlord, therefore, has some rights of access but it's very limited. You have a considerable degree of rights to keep them out, but it's not absolute.
Just because a tenancy agreement contains a clause granting access doesn't automatically mean it's enforceable. Unfair and unreasonable clauses are likely to be void. And as I said, tenants have rights too, not least of which is quiet enjoyment.
Again, as I said, the legal situation is far from simple, and much of the advice on what "rights" exist are simply wrong, and carried legal risks.
As a pragmatic matter, my advice to landlords would be never to enter without explicit permission. Doing so carries risks of complications, too. But the "right" to enter exists, and can be enforced. The distinction is between what is legal, and what is advisable. Short of court injunctions, actions like changing locks are risking the landlord/tenant relationship deteriorating unnecessarily, and they often aren't great to begin with, and could lead to steps to terminate the tenancy.
As it looks like 5UB has finally managed to get the agency to pay attention, it all looks a academic now anyway. I've said what I've said and I'm not going to keep going over it correcting misinterpretations of it. I should have listened to my inner voice and not commented in the first place.