So in this scenario there is no real advantage to be gained by obtaining cheaper funding outside of the limited company? It would be better to obtain the mortgage within the limited company? Can you think of a way to optimise the structure better? We currently have not set up a limited company - basically we are trying to find the most tax efficient way to buy houses to let.
My current thinking is that a Limited Company is best as salary and dividends can be paid and you can manage IHT OK by adding dependents as owners of the company - but the main complication seems to be getting funding as a limited company.