Yes, you can so long as your sale price equals or exceeds the amount left to repay on your mortgage loan (including any early repayment charges).

Yes. It's called "porting" and most mortgages have this facility.

Yes. There will be different costs depending on whether you are keeping the same level of borrowing, increasing it or decreasing it.

Porting your mortgage deal means staying with your existing lender. It can be a good money-saving option especially if you are part way through a deal which carries exit fees and early repayment charges since you could avoid having to pay (or at least be refunded for) these when you move.

Yes, however you could have early repayment charges to pay if you have only had your mortgage product for a short amount of time.

A second home mortgage is for someone who already owns a home and is looking to buy another property.

Your reason for taking out a second home mortgage is important as it will affect the type of mortgage you need.

Lenders’ criteria for mortgages to buy a second home are much the same as they are for any mortgage – but the affordability checks are more stringent. With two mortgages, lenders are likely to consider you as a higher risk.