Morning

I am in the process of trying to get a rate to remortgage my residential property. i have a very good credit score and a self funding buy to let property. i booked a rate with first direct only to be told a week later that they would not lend me the money because i havent had my buy to let for 3 years. this seems a bit unfair i can prove through bank statments or the rental company that it pays the mortgage. is there any way around this as they said the have to include the but to let mortgage as an expense as well and that it becomes unaffordable which is a lie as its self funding. please help

Steve Brown