According to Wikipedia, Mencap started life as The National Association of Parents of Backward Children in 1946. In 1955 it became The National Society for Mentally Handicapped Children. Following royal involvement in 1981, it became The Royal Society for Mentally Handicapped Children and Adults. In 2002, it finally settled for the name The Royal Mencap Society, which is frequently shortened to just Mencap.
The common thread in these numerous name changes, is the lack of political correctness. Even Mencap is an amalgamation of two words. Mental (not a particularly pleasant title to bestow upon somebody) and Handicapped ( a word that has evolved over time from the phrase Cap in Hand, and refers to begging).
Well if they cannot be bothered themselves to make an effort, I thought I would throw my hat into the political incorrectness ring. It has come to my attention, that the Mencap headquarters in Peterborough have become flooded. In their insurance claim, Mencap have stated that this is due to rising waters caused by adverse weather conditions. How can they be sure that it just wasn't caused by excessive dribble?