I would add a note of caution about investing heavily in property at the moment.
House prices have been buoyed by extremely low interest rates over the last 3 years. Yet despite this house prices hare still well below their peak. Why? The answer is availability of credit, or lack of. Most high street banks are still in the process of recapitalising and repairing their balance sheets following the financial crisis. They only want to lend to people with healthy deposits, who they percieve to be a safer bet, but this is restricting demand for property.
That's why house prices have slid a little in the last few years, however there could be more to come. When interest rates start to rise, which they almost certainly will over the next couple of years, so will mortgage repayments for anyone who isn't on a fixed rate.
You need to honestly ask yourself if you could still afford the mortages on both properties if interest rates were 2-3% higher thna today (or even more). Also think about what impact higher interest rates will have on the housing market and house prices. There's a lot of downside risk on property at the moment in my view.