See my selection of top strong and sweet wines to be published tomorrow - JR According to both of the biggest British-run port producers, The Fladgate Partnership and the Symington family, aged tawny port is set for significant growth. It has hitherto been something of a niche product, currently accounting for only 3% of UK port sales, but concerted efforts are being made to increase that number. To that end, both companies coincidentally held recent tastings in London in which they presented their tawniest offerings. The Symingtons believe that aged tawny port is relevant to the future because it doesn't need ageing or decanting, and...