Are there any downsides to paying off mortgage?

[DiscoTent]

We're out of any fixed rate early redemption charges so I think paying off the mortgage is more sensible than putting money into savings, but I'm not sure if there's anything I need to know.

Do you have to pay to store your deeds?

If I want to re-mortgage in the future will this effect my credit rating? We're thinking of extending, but it would still be low loan to value ratio and our current mortgage deal is crap, so we'd still have to start a new one. I'm just not sure if it's better to keep this process continuous or if a gap doesn't matter?

[Succubi]

You no longer get given title deeds just an official copy of the land register. You don't need to worry about storage.