Background: Anthony Neil Wedgwood Benn (3 April 1925 - 14 March 2014), originally known as Anthony Wedgwood Benn, but later as Tony Benn, was a British politician, writer, and diarist. He was a Member of Parliament (MP) for 47 years between the 1950 and 2001 general elections and a Cabinet minister in the Labour governments of Harold Wilson and James Callaghan in the 1960s and 1970s. Originally a moderate, he was identified as being on the party's hard left from the early 1980s, and was widely seen as a key proponent of democratic socialism within the party. Benn inherited a peerage on his father's death (as 2nd Viscount Stansgate), which prevented his continuing as an MP.
Context: Benn's father had been created Viscount Stansgate in 1942 when Winston Churchill increased the number of Labour peers to aid political work in the House of Lords; at this time, Benn's elder brother Michael was intending to enter the priesthood and had no objections to inheriting a peerage. However, Michael was later killed in an accident while on active service in the Second World War, and this left Benn as the heir to the peerage. He made several unsuccessful attempts to renounce the succession.  In November 1960, Lord Stansgate died. Benn automatically became a peer, preventing him from sitting in the House of Commons. The Speaker of the Commons, Sir Harry Hylton-Foster, did not allow him to deliver a speech from the bar of the House of Commons in April 1961 when the by-election was being called. Continuing to maintain his right to abandon his peerage, Benn fought to retain his seat in a by-election caused by his succession on 4 May 1961. Although he was disqualified from taking his seat, he was re-elected. An election court found that the voters were fully aware that Benn was disqualified, and declared the seat won by the Conservative runner-up, Malcolm St Clair, who was at the time also the heir presumptive to a peerage.  Benn continued his campaign outside Parliament. Within two years, though, the Conservative Government of the time, which had members in the same or similar situation to Benn's (i.e., who were going to receive title, or who had already applied for writs of summons), changed the law. The Peerage Act 1963, allowing lifetime disclaimer of peerages, became law shortly after 6 pm on 31 July 1963. Benn was the first peer to renounce his title, doing so at 6.22 pm that day. St Clair, fulfilling a promise he had made at the time of his election, then accepted the office of Steward of the Manor of Northstead, disqualifying himself from the House (outright resignation not being possible). Benn returned to the Commons after winning a by-election on 20 August 1963.
Question: What is peerage?
Answer: Labour peers to aid political work in the House of Lords;

Background: Brotherhood of Man are a British pop group who achieved success in the 1970s. They won the 1976 Eurovision Song Contest with "Save Your Kisses for Me". Created in 1969 by songwriter and record producer Tony Hiller, Brotherhood of Man was initially an umbrella title for a frequently-changing line-up of session singers. Early on, they scored a worldwide hit with the song "United We Stand".
Context: Keen to keep the established name alive, Hiller set about putting a new line up together. In 1972 he got together a trio of session singers, Martin Lee, Nicky Stevens and Lee Sheriden.  Sheriden was already known to Hiller as a songwriter and had a solo career. Lee had a solo single to his name and was a budding songwriter. Stevens had been classically trained, but had since adapted her vocals and was performing as a cabaret singer. The trio began recording together, but their first single, "Rock Me Baby", to be released at the end of 1972, was cancelled due to the release of the song by David Cassidy. Finally their first two singles "Happy Ever After" and "Our World of Love" were released in 1973. Neither single charted and soon after, another female vocalist was added to the line up, Sandra Stevens. Stevens (no relation to Nicky) had been performing as a big-band singer since a teenager in the late 1960s. She had sung with the Joe Loss big band and alongside Eve Graham (of The New Seekers) in club group, The Nocturnes.  Now signed to the Pye spin off label, Dawn, the quartet released their first single, "When Love Catches Up on You" in January 1974. It failed to chart, but the follow-up single, "Lady" became a hit in Europe. Encouraged by this, the group set about recording their debut album. The album Good Things Happening was released later in the year along with two more singles, but none of these found success. Before the record label folded, Brotherhood of Man released one more single in the Summer of 1975. This was the upbeat "Kiss Me Kiss Your Baby" and although failed to make an impression in the UK, became a big hit in Europe, reaching Number one in Belgium and Number two in the Netherlands as well as top 10 placings in other countries. Brotherhood of Man toured extensively in Europe, honing their stage act and harmonies, while Hiller, Sheriden and Lee worked on composing songs for their second album. Among them was a song Sheriden had largely written called "Save Your Kisses for Me".
Question: How long did this current line up last?
Answer: