If I remortgaged a rental property to raise money to buy something else, such as a car or another property, but then decided to sell the remortgaged property, on selling would the new mortgage be taken into account and reduce any potential capital gains tax (CGT)? Or would CGT be based on the original mortgage and become due on settling that at the time of remortgaging? 

Arthur Weller replies:  

The CGT rules ignore mortgages. CGT on a property sale is calculated from the sale proceeds minus allowable costs under TCGA 1992, s 38 (purchase price, buying or selling costs, and qualifying capital improvements). How you financed the property (and what you spent any remortgage funds on) is irrelevant to the CGT computation. So even without remortgaging, your original mortgage would also not have made any difference to your CGT computation.