A fantastic American site with a huge amount of information about Giant Redwoods with detailed questions and answers on growing, planting and looking after the world's largest tree. Highly recommended!
Essays on Redwood Botany by Dr. Herbert Baker (1965) - Mentions Redwoods doing well in the UK but also states "never heard of any seedlings actually making their appearance".
English Nature site - Mentions "The flora, which probably grew on the mountainous slopes of Dartmoor and in the valley flood plain is dominated by redwood conifers..."
The Woodland Trust - A useful directory of woods in the UK managed by the Woodland Trust. Includes this article on The Secret Forest of Umbria, Italy in the Ancient Tree Forum.
This unique book is an exceptional record of maritime history about famous yachts, brave crews, and their love of sailing by John Jeffries. A stunning book, highly recommended to anyone with an interest in yachting.