Release equity on property A to pay off mortgage on property B

I own 2 properties : Property A and property B .
Only small mortgage left on property A and will be fully paid in 3 years , Bank A is not interested in changing any of the mortgage conditions , lost my job and had to move city hence property A is currently rented .
Bough property B 6 months ago with 25 years mortgage , my circumstance might change in 6 month time and my partner along with kids might need to live in City A for 1-2 years before returning back to city B . Asked Bank B if I can move all my mortgage to property A as it will be my PPR for this period and I will rent out rooms in property B as I still need to live in B and commute in weekends to city A .
I understand I can only have one PPR ,Therefore I asked Bank B if I can take up 1 mortgage for the 2 properties or balance the 2 mortgages between the 2 properties , so I could have let say 10 years on each or something similar . Bank B said they can't release equity of a property to pay off mortgage on different property , they normally release equity for building extension ,...etc

Is my ask doesn't make financial sense or it is only this bank that is not interested and I should shop around ? Bank B is currently offering good interest rate so didn't want to loose business with them really .

What would be best approach , to have a property mortgage free and one with investment interest rate or 2 medium mortgages ( one PPR and one investment ) ?

Thanks appreciate your feeback

Hak

I find that incredibly difficult to follow. I am not sure what you are trying to achieve?

Are you trying to get a better rate? If you have only three years left on Mortgage A, the interest you pay will be very low, so I doubt if the legal costs of moving a mortgage for a better rate would be justified.

So what if you can have only one PPR? The advantage of a rental property is that you will get tax relief on 75% of the interest paid. The disadvantage is that any gain on sale will be subject to CGT.

apologies if this wasn't so clear .

I am not trying to get a better rate , What I am trying to achieve is to refinance my two mortgages and move the bigger mortgage to property A and keep mortgage B to minimum or zero . So looking to swap the situation , from small mortgage left on property A and large mortgage with 25 years on property B , to large mortgage on property A and zero on B. That might be considered release equity from property A to pay off mortgage B and stay with one main mortgage on property A .

Hope that make more sense to you

Thanks
Hak

No bank would directly be interrested in this type of swop. Your mortgage agreement on B is straightforward & presumably you are paying the mortgage. As brendan stated there is no apparent obvious saving or motivation for what you are proposing. As a banker I would find the proposal strange and unattractive. I doubt if you will find any takers for this proposal!

Thanks for your feedback , The reason I want to go down this route is that my PPR will be property A if the family moves there , and don't want to be subject to investment interest rate on property B if I decide to rent it out , so there will be significant saving here for me .

Is it still not making financial sense to banks ?

Thanks
Hak