Take tax advice. But to be fair if it is only one property, I might be inclined to just do it as a btl rather than through a ltd company. The taxation consequences of selling in a ltd co are horrific. If you are looking at a portfolio then a company might be better.
I think professional advice tailored to your individual circumstances would be best.
It is better to buy a second property via a limited company as it has a couple of financial benefits. One benefit is the way you are taxed on the rental income as now you will be liable to a Corporation Tax. But before making the decision, you need to consult a professional who will analyze your situation and offer advice and guidance.