Hurrah! The Great British Bake Off is back. For the next 10 weeks we can indulge in comfort television involving people making cakes. What could be more entertaining? Because we are entitled to treats at each advert break, I opened a bottle of ancient Prune & Parsnip. This has aged extremely well - it is entirely smooth with a depth of flavour that makes it more interesting than its younger brethren. And there is still one bottle to go, hidden somewhere in the depths of this house.