Which group was the first to achieve seven consecutive number-one singles in the UK?

Westlife are holders of the following Guinness World Records: first to achieve seven consecutive number-one singles in the UK, most public appearances in 36 hours by a pop group, most singles to debut at number one on the UK chart and top selling album group in the United Kingdom in the 21st century.

Westlife are an Irish pop vocal group, which formed in 1998 in Sligo, disbanded in 2012 and reunited in 2018. They were originally signed by Simon Cowell in the UK, Clive Davis in the US and managed by Louis Walsh and Sonny Takhar. The group currently consists of Shane Filan, Mark Feehily, Kian Egan, and Nicky Byrne.

The band has received numerous accolades including one World Music Award, two Brit Awards, four MTV Awards, four Record of the Year Awards and overall with a total of 97 awards and 20 nominations (individual members' awards not included) so far. As a live act, Westlife have sold 5.5 million concert tickets worldwide from their thirteen concert tours so far. They still hold the record for the most shows played at The SSE Arena, Belfast and SSE Arena, Wembley. They sold out Croke Park Stadium in a record breaking 5 minutes. Also hailed as the biggest arena act of all-time in the United Kingdom.