Remortgaging to buy investment property- query on tax relief

Hi myself (higher rate tax payer) and my wife (low rate tax payer) are in the process of jointly purchasing a second property to be a holiday let. We will either secure a £100k interest only holiday let mortgage OR remortgage our own home and borrow £100k additional against that (again interest only) to fund the buy to let/holiday let purchase. Can you confirm we are able to claim tax relief on the 100k mortgage interest payments in both cases? We'd particularly like confirmation we can definitely get tax relief on mortgage interest payments in the second case where we would borrow the additional money against our own home? Many thanks Dan

Hi,
Provided the re mortgage was taken out for the purpose of purchasing the let property, any interest paid on that mortgage for the period of letting can be claimed.
The emphasis is the purpose of the loan , not how the loan is secured:
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However , when considering the re mortgage , you should ensure that the lender will give approval for the purpose that the loan is intended and it is not higher than the relevant commercial rate that interest would be charged if the property was purchased with a direct loan.
Also, if the property is to be a Furnished Holiday Let, restrictions under PIM 4140 do not apply.
Thank you.