Doctor and the Medics are an English glam rock band formed in London in 1981.
 The group received their great success during the 1980s and are best known for their cover of Norman Greenbaum's "Spirit in the Sky", the group's hit single which reached No. 1 in the UK singles charts.
 The band currently performs, with a different line-up, as a tribute act to various artists.
 The group's musical style includes neo-psychedelia, glam rock, new wave and pop rock.
"Dyna-mite" is a 1973 single, written by the songwriting team of Mike Chapman and Nicky Chinn.
 It was originally rejected by The Sweet and later inherited by the English glam rock band Mud.
 Chapman and Chinn produced the song as well.
"Lonely This Christmas" is a popular Christmas song by the English glam rock band Mud, that
Mud (now Mud II) are an English glam rock band, formed in February 1966.
 Their earlier success came in a pop and then glam rock style, while later hits were influenced by 1950s rock and roll, and are best remembered for their hit singles "Tiger Feet", which was the UK's best-selling single of 1974, and "Lonely This Christmas" which reached Christmas number 1 in December 1974.
 After signing to Rak Records and teaming up with songwriters/producers Nicky Chinn and Mike Chapman, the band had fourteen UK Top 20 hits between 1973 and 1976, including three number ones.
"Another Rock and Roll Christmas" is a Christmas song by English glam rock singer Gary Glitter, written by Glitter with Mike Leander and Eddie (Edward John) Seago and produced by Mike Leander.
 It was one of the most played Christmas hits on UK radio from the mid-1980s to the mid-1990s, but is now rarely heard publicly following Glitter's convictions on child pornography and abuse charges.
 Initially released in 1984, the song was later included on Glitter's fifth studio album, "Boys Will Be Boys" (1984) and was reissued many times, both as a single (including a collectors picture disc) and on other albums.
Rob Davis (born Robert Berkeley Davis, 1 October 1947, Carshalton, Surrey, England) is an English guitarist and songwriter.
 He was a guitar playing member of the 1970s glam rock band Mud, who achieved the biggest selling Number One record of 1974 in the United Kingdom, with their song "Tiger Feet".
 After the band's eventual demise in 1977, Davis worked with several other groups, including The Tremeloes and Darts, but his efforts met with little commercial return.
Wizzard were an English glam rock band formed by Roy Wood, former member of The Move and co-founder of the Electric Light Orchestra.
 "The Guinness Book of 500 Number One Hits" states, "Wizzard was Roy Wood just as much as Wings were Paul McCartney."
 They are most famous for their 1973 Christmas song "I Wish It Could Be Christmas Everyday".
"I Wish It Could Be Christmas Everyday" is a Christmas song recorded by British glam rock band Wizzard.
 It was first released in December 1973 and, as with most Wizzard songs, was written and produced by the band's frontman Roy Wood — formerly of The Move and a founding member of ELO.
 Despite the song's strong, long-lasting popularity, it has reached no higher than number four on the UK Singles Chart, a position it occupied for four consecutive weeks from December 1973 to January 1974.
 The song was famously beaten to the 1973 Christmas Number 1 spot by Slade's "Merry Xmas Everybody" which remained at the top of the charts for five weeks, from December 1973 to January 1974.
"Tiger Feet" is a popular song by the English glam rock band Mud, released in January 1974.
 Written and produced by the songwriting team of Nicky Chinn and Mike Chapman, it was the band's first number No. 1 single in the UK Singles Chart.
Thomas Leslie "Les" Gray (9 April 1946 – 21 February 2004) was an English musician best known for his work with glam rock pop band Mud.
 Gray was also known for his distinctive vocal impersonation of Elvis Presley.

Question: What Christmas song reached number 1 in 1974 by the the English glam rock band Mud,?
Answer: Lonely This Christmas