The Impossible Dream has overtaken Justin Timberlake's third studio album The 20/20 Experience to spend the most consecutive weeks at number one this year.
The album also shares the record for total weeks at the top spot in 2013 with the soundtrack to Les Misérables, which spent two sets of two weeks at number one in January and February.
The Britain's Got Talent finalists held off stiff competition from Rudimental's album Home which missed out on the top spot by just over 2,000 copies.
Travis enter at number three with their first offering for five years Where You Stand, while John Mayer's Paradise Valley debuts at four.
Graffiti on the Train by Stereophonics jumps a huge 16 places to claim the number five spot.
Tired Pony enter the chart at 14 with The Ghost of the Mountain, while Earl Sweatshirt's first solo album Doris debuts at 23.
Watch Richard and Adam perform below:
Source: Official Charts Company
> This week's singles chart
View the latest Official Top 100 Album Chart