The 1970s were a mix of gloom and glitter. The queen and Prince Philip celebrated 25 years of marriage, and their daughter, Princess Anne, wed fellow equestrian Mark Phillips. But the troubles in Ireland spread to mainland Britain. Strikes forced a three-day working week, and a fuel crisis sparked food shortages and mounting discontent across the country. The long, hot summer of 1976 was burned into memory - both for the heat wave and civil unrest. But in 1977, the queen's Silver Jubilee revived the nation, with street parties and bunting stretching mile after mile. The queen was greeted by an outpouring of affection both at home and across the Commonwealth. But Royal tragedy followed with the assassination of Prince Philip's uncle, Earl Mountbatten. And after Margaret Thatcher became the first female prime minister in British history, the two most important positions in the country were now occupied by women.