Hi Zeitgeist,
I would tend to agree with Paul. If you have a property working that well for you in a market which suggests signs of increasing further in value, I would be inclined to hold on to it and release equity to purchase again. Depending on how much positive income you are receiving you may even be in a lucky enough position to keep your re-mortgage repayments covered (on an interest only basis) with the income in Aberdeen leaving you free to concentrate on the purchase and rental of your new property(s).
Kind regards,