What have they been up to?

1 ANNI-FRID LYNGSTAD, 70: Married Abba bandmate Benny in 1978 but divorced in 1980, then wed Prince Heinrich Ruzzo Reuss of Plauen in 1992, who died in 1999. Had solo career after Abba split and became an environmental campaigner. Recorded an album in 1996 and a single in 2015. Is reportedly worth £75million.

2 BJORN ULVAEUS, 71: The father of four is now married to music journalist Lena Kallersjo. Has two children with ex-bandmate Agnetha. They also split in 1980. Created musicals Chess, Kristina fran Duvemala and Mamma Mia! with Andersson, and co-composed the 201 Eurovision Song Contest anthem. He also executive produced the Mamma Mia! film and runs an IT firm. Is said to be worth £100million.

3 BENNY ANDERSSON, 69: Has two children with Christian Gronvall – they divorced in 1966. Following 1980 split from Anni-Frid he married Swedish TV presenter Mona Norklit in 1981, and they had son, Ludvig. As well as producing the musicals and film, he runs a boutique hotel in Stockholm and breeds racehorses in West Sussex. Is thought to be worth £100million.

4 AGNETHA FALTSKOG, 66: Married Swedish surgeon Tomas Sonnenfeld in 1990, ten years after split from Bjorn, but they divorced three years later. Launched short solo career after Abba’s 1982 split. After years living on a secluded island west of Stockholm, she released a comeback album in 201 featuring a duet with Gary Barlow. Her reported worth: An estimated £4million.