Radio, the Landlord can give notice....it isn’t that a tenant can stay indefinitely.
Normally (non Covid) if a tenant has a 6 month agreement, the Landlord can give notice at the 4 month point and the tenant is due to move out 2 months later. Most will. If they don’t, eviction proceedings can start.
But think about what you’re suggesting with the 6 month let. What about if the tenant wants to stay on, what if the Landlord wants them to stay on (often the case) - at what point does that become clear, without notice periods? At what point does it become clear without notice periods that the Landlord needs the property back or the tenant isn’t renewing? It cannot be on the day the 6 month period is up...that doesn’t work for anyone. Notice periods are vital.
At the moment, the 6 month notice period is long and tricky ....but we are in uncial circumstances where moving to a new rental is difficult because of Covid. This won’t last forever.
A tenant is entitled to be in the property until the end of the notice period. What do you suggest is the alternative to starting eviction proceedings after that point passes? They can’t be started before, because clearly the tenant hasn’t done anything wrong by being there ar is legally allowed to be there. Only after that point can those proceedings begin. What is your issue with this? Clearly they will take some time. What is the alternative.
I think perhaps you just need to think through the timescales in terms of giving notice and people knowing what the intentions of each other (landlord and tenant ) are rather than saying that a 6 month tenancy means the tenant must be gone by the 6 month point. Can you get your head round the idea that the tenant is supposed to go by the end of the notice period...in some ways it’s a similar idea to the one you’re thinking of. Usually that notice period is 2 months (which lets face it is only 8 weeks to uproot yourself and find alternative accommodation...not easy for a family) after at least 4 months of a 6 month tenancy have passed, but currently 6 months. The key is the Landlord gives notice as soon as they can and realise they need the property back. Landlord delays in giving formal notice are often what drags it all out. This has been the case here for Op. Despite wanting to sell, despite knowing exchange cannot happen with a tenant, the seller only gave notice in February, despite accepting an offer in September. Legally the tenant can be there until August. If the section 21 had been issued in September, they would have still had the right to be there until March. The timescales never worked really for benefitting from the stamp duty holiday and wee always far too risky for the Op. she should have known that and done her due diligence and checked these things out.
The fact Op seems unbothered about the roles of the solicitor and estate agent in all this, for not highlighting to her the problems the seller was creating and in, strikes me as astonishing. It’s why I think the post is a reverse or far from complete in describing events.