Second mortgage - consent to let

[Marble10]

I am losing sleep over this & am not seeing my mortgage advisor until next week so really hope someone can help put my mind at ease!

I'm looking to buy with my partner. He already has a long term rental property which has been on a 'permission to let' basis.
He lives with me in my property.

I have 1 year left on my fixed term mortgage deal, and planned to 'permission to let' for 1 year, then figure out if I will sell or remortgage etc. rather than paying early repayment fees for the sake of a year (this would be approx 3k)

The problem I've now come across is because the property isn't rented yet it's coming up as we can't afford it. Surely it's not uncommon for someone who plans to rent their property out, but not have done it yet as they are still living in it? What way round is there please? Already additional property stamp duty so keen to avoid more expensive fees on changing the mortgage to BTL.
I can't sleep on thinking we May not be able to get the mortgage on the new property!

You can generally get a permission to let to go and live in a rented property yourself, or to go and live in a new partners house etc.

They are unlikely to give you a new mortgage while you still have a residential mortgage on another property (unless you can afford both).

You either want to be a landlord or you don't, if you do then you need to switch to a BTL mortgage. I wouldn't do it with the renters reform bill working through parliament.

Just seen the update, if you think £3k in fees is a lot then you shouldn't be looking to rent the property out.

I've got friends who've done it, copped for shit tenants who did 20k worth of damage and then it cost them 5k to get them out.

Post tax, you'll probably net less than you will in a savings account as well.