The list gives you the details on the most fatal rail accidents in United Kingdom that claims the life of many persons. The worst accident was the Quintinshill rail disaster in 1915, during which 226 persons killed. The crash involves 5 trains and remains the worst in UK. The persons killed were mainly Territorial soldiers from the 1/7th (Leith) Battalion, the Royal Scots heading for Gallipoli. Next comes the Armagh rail disaster on 12 June 1889 which claimed the lives of 80 persons. The third worst one is the Tay Bridge disaster happened on 28 December 1879 which killed 75 persons.