Alan Titchmarsh is once again uncovering the secrets and incredible stories hidden within some of Britain's most remarkable historical buildings. Whether it s speeding down the Anglesey Strait, exploring hidden tunnels, reading love letters from famous British artists or meeting the granddaughter of one of Britain s greatest men, you can be sure that Alan will be giving us a truly unique insight into these grand properties and revealing the secrets that are most definitely not on the visitor route.