In its seventh week on release, the album has hopped back up one spot to reclaim the throne.
This means it replaces Ariana Grande’s Sweetener, which had hit the summit last week.
Mamma Mia 2’s soundtrack had initially debuted in the Top 5 before the film hit cinemas, and then rapidly ascended to Number One – where it remained for four weeks. Grande then forced it to spend a week at No2.
Now, it’s back in pole position, narrowly ahead of the unmovable Greatest Showman soundtrack at No2, while Grande slips to No3.
Mamma Mia: Here We Go Again was the best-selling record of the week in terms of physical units, while The Greatest Showman did best on digital downloads, and Grande’s Sweetener racked up the most streams.
But when all three metrics were combined, and the rules of sales-equivalent streams were applied, it was the ABBA-centric album that came out on top, trumping Greatest Showman by just 2,000 combined equivalent copies.
George Ezra’s Staying At Tamara’s is at No4, while Drake’s Scorpion holds at No5.
Further down, the highest new entry is from Interpol with Marauder at No6, also this week’s best-selling vinyl.
Alice in Chains get their first ever UK Top 10 at No9 with Rainier Fog, while K-Pop outfit BTS claim their first ever UK Top 20 album with Love Yourself: Answer at No14.
Mamma Mia 2 has continued to leave fans and analysts impressed since its release in July.
As of last weekend, it was still in the Top 2 in the UK chart, and within just £9 million of matching the huge box office total achieved by its 2008 predecessor.
Although many still doubt the sequel can eclipse the first film in box office receipts, it has got far closer than many had predicted.
The sequel picked up better-than-expected reviews and has benefitted from very positive word of mouth from fans.
Songs included this time around include Angel Eyes, Fernando, Andante Andante, When I Kissed The Teacher and My Love My Life.
The likes of Dancing Queen, Super Trouper and Mamma Mia also return for second outings.
Mamma Mia: Here We Go Again is out now.
