The document summarizes several notable old trees in the UK, including: - The Crowhurst yew in Surrey, believed to be 4,000 years old and famous for having a wooden door built into its trunk. - The oldest tree is a 5,000-year-old yew tree located in the churchyard of St Cynog's in Wales. - The Marton Oak in Cheshire is thought to be over 1,000 years old, with a girth of over 14 meters. It is considered one of the oldest oaks in England. - The Fortingall yew in Scotland is estimated to be between 2,000-5,000 years old, making