'The military casualties incurred by the UK during the World Wars dwarf anything that has occurred since.
Three times as many British forces died on the first day of the Battle of the Somme (19,240) than have been killed in every combat operation since the end of WWII. Had the Prime Minister read out their names in the House of Commons, as has been done since 2003, it would have taken at least 11 hours. Over the course of the war, 880,000 British forces died, 6% of the adult male population and 12.5% of those serving. The toll on the adult male population meant that the 1921 Census recorded 109 women for every hundred men.
In WWII there were 384,000 soldiers killed in combat, but a higher civilian death toll (70,000, as opposed to 2,000 in WWI), largely due to German bombing raids during the Blitz: 40,000 civilians died in the seven-month period between September 1940 and May 1941, almost half of them in London.'