How does anyone buy a house from renting

[WeAreTheWeirdosMister]

So I rent and started on the 25th of a month and have to give my notice on an anniversary of that date - so if I give notice now it doesn't start until 25th Jan and we'd leave 25th Feb...
I am currently in the process of buying and yesterday they've suggested we complete next Monday 25th Jan.

I am flustered to say the least - how do people do this - do I go for the Jan date and pay rent for an empty flat for a month (£1k) which would bereft me, or push the completion back and month putting everyone out?

Is this overlapping a normal cost I should have taking into account or do you usually get more than 7 days notice?

When we rented and bought our first house this us what we did... we got advised from friends and family that until contracts are exchanged anything could happen! We decided to not give notice at our rented place (one months notice) till completion day on our property. This did mean we payed for an extra month but it did give us time to move in slowly and get our dog use to the new property first before moving all in one day. Also usually your mortgage company doesn't normally take the first mortgage payment till 6 weeks after completion so paying that extra month on the rented house didn't feel too much of a struggle financially

I would probably suck up the extra month rent and have an overlap. If things get pushed back (entirely possible) you’re going to be so stressed if the dates are tight. It’s also really helpful for moving a decorating to be able to take some time.

When we personally were in a similar situation we let the landlord know. He wanted to sell the property anyway so he was happy to allow us to stay there for an extra couple of weeks and just charge us half a months rent. I appreciate they might not all be as accommodating and they might have new tenants lined up so that wouldn’t be possible.