How often are British general elections?
In theory, they are held every five years but, in practice, they tend to be held after about four years. The longest interval was occasioned by the Second World War: 1935-1945. Sometimes, however, general elections have been held with surprising frequency.
I was reminded of this from my current lockdown reading of the 900 page biography of Winston Churchill by Roy Jenkins. I have reached the point in which there were two general elections in the same calendar year: January/February 1910 and December 1910. Churchill was a Liberal at this time.
Only on one other occasion in British political history have we had two general elections in the same calendar year and the interval of time between the two was even shorter: February 1974 and October 1974. I was a Labour candidate in both these elections.
But there have been other occasions when general elections were held in close proximity: 1806 and 1807; 1830, 1831, and 1832; 1885 and 1886; 1922, 1923 and 1924; and 1950 and 1951.
You can find a full list of United Kingdom general elections here.