Princess Margaret: A Scandalous Affair

Channel 5, 8.40pm

The Queen's free-spirited sister (below) hit the headlines many times during her 71 years of life, including when she courted Antony Armstrong-Jones, who became the first non-aristocrat to marry into the Royal Family for 400 years when they wed in 1960. Here, archive footage and expert testimony are used to chart their rocky relationship, which ended in divorce in 1978. ★★★☆☆