Question: what does Ray Dorset and Brian May have in common?

Context articles: Ray Dorset
A Case for the Blues
Cold Blue Excursion
Paul King (Mungo Jerry)
Electronically Tested
In the Summertime (album)
Katmandu (band)
Brian May
Mungo Jerry
In the Summertime

Raymond Edward Dorset (born 21 March 1946) is an English guitarist, singer, songwriter, and founder of Mungo Jerry.
 He composed most of the songs for the band, including the hit singles "In the Summertime", "Baby Jump", "Lady Rose", "You Don't Have to Be in the Army to Fight in the War", "Long Legged Woman Dressed in Black", and "Hello Nadine" plus "Feels Like I'm in Love", a Number #1 single for disco singer Kelly Marie.
A Case for the Blues is a blues album by Katmandu, a British band made up of successful musicians from differing musical backgrounds, including Peter Green of Fleetwood Mac, Ray Dorset of Mungo Jerry and Vincent Crane of Atomic Rooster.
 Released in 1985, this was the only album by the band.
Cold Blue Excursion was a solo album recorded by Ray Dorset, leader of Mungo Jerry.
 The majority of the group’s songs at the time were good-time blues, skiffle and rock’n’roll, and these songs on the solo album, written by him during the previous seven years, were designed to show his versatility as a songwriter away from the confines of the basic Mungo sound.
 The two photos of Dorset inside the gatefold sleeve — one of him sitting in a woodland clearing playing an acoustic guitar, the other of him onstage delivering an impassioned vocal performance with an electric guitar around his neck — summed the album up as well as the quotes from Woody Guthrie printed inside along the track list —""A song was just a song to me...In my own mind, a song is just a song...""
Paul Malcolm King (born 9 January 1948, Dagenham, Essex, England), is an English musician who was a member of Mungo Jerry between 1970 and 1972.
 He contributed occasional lead vocals, and played acoustic guitar (6 and 12 string), banjo, harmonica, kazoo and jug.
 His songs on the first Mungo Jerry album and on the early maxi-singles were generally more folksy and lighter in style than those of group leader Ray Dorset, and he was frustrated when his own songs were constantly rejected for subsequent albums.
Electronically Tested is the second album by Mungo Jerry.
 The UK release was on Dawn Records, and it appeared with slightly different track listings in other countries, as many territories outside the UK had already added the group’s first hit "In The Summertime" to the running order on the eponymous first album.
 All songs were written by the group's front man Ray Dorset, apart from an extended version of the Willie Dixon blues standard "I Just Wanna Make Love To You".
 In some other countries, pressings included the Paul King song, "Black Bubonic Plague", and the album was also retitled "Memoirs of a Stockbroker", as the UK title (taken from an advertisement for contraceptives) was deemed too risqué.
In the Summertime is a 1970 album recorded by Mungo Jerry.
 It contains their biggest hit, "In the Summertime" and its B-side, "Mighty Man".
 Also included are the country hits, "San Francisco Bay Blues", recorded in 1954 by Jesse Fuller, Arthur Gunter's "Baby Let's Play House", also from 1954 and Woody Guthrie's "Dust Pneumonia Blues" which also appeared on the B-side of "In the Summertime".
 All other tracks were composed by Mungo Jerry's lead singer, Ray Dorset on his own or with fellow band members, Paul King, Colin Earl and Mike Cole.
Katmandu were a short-lived British blues band, formed in 1983, featuring Peter Green, Ray Dorset, Len Surtees and Vincent Crane.
 After releasing one album, the group split the following year.
Brian Harold May, {'1': ", '2': ", '3': ", '4': "} (born 19 July 1947) is an English musician, singer, songwriter and astrophysicist, best known as the lead guitarist of the rock band Queen.
 He uses a home-built electric guitar, called the Red Special.
 His compositions for the band include "We Will Rock You", "Tie Your Mother Down", "I Want It All", "Fat Bottomed Girls", "Flash", "Hammer to Fall", "Save Me", "Who Wants to Live Forever" and "The Show Must Go On".
Mungo Jerry are a British rock group who experienced their greatest success in the early 1970s, with a changing line-up that has always been fronted by Ray Dorset.
 The group's name was inspired by the poem "Mungojerrie and Rumpleteazer," from T. S. Eliot's "Old Possum's Book of Practical Cats."
 The group's biggest hit was "In the Summertime".
 It remains their most successful and most recognisable song.
 They had nine charting singles in the UK, including two number ones, and five top 20 hits in South Africa.
"In the Summertime" is the debut single by British rock band Mungo Jerry.
 Written and composed by its lead singer, Ray Dorset, it celebrates the carefree days of summer.
 In 1970, it reached number one in charts around the world, including seven weeks on the UK Singles Chart, two weeks on one of the Canadian charts, and number three on the "Billboard" Hot 100 singles chart in the US.
 It became one of the best-selling singles of all-time, eventually selling more than 30 million copies.