Do i need to pay stamp duty on a remortgage of 119,999 if i am taking a person off the mortgage/deeds?

im looking to remortgage and borrow slightly more...my remortgage amout is �113,500 + �6,500 extra capital plus any mortgage fee's under �2,500 but i thought stamp duty was only payable on a property purchase and not remortgage?i am removing a name from the mortgage and deeds and wonder if that effects things?