Answer by taking a quote from the following article:

Take That are an English pop group formed in Manchester, in 1989. The group currently consists of Gary Barlow, Howard Donald and Mark Owen. The original line-up also featured Jason Orange and Robbie Williams. Barlow acts as the group's lead singer and primary songwriter, with Owen and Williams initially providing backing vocals and Donald and Orange serving primarily as dancers.

Robbie Williams's drug abuse had escalated to a near drug overdose the night before the group was scheduled to perform at the MTV Europe Music Awards in 1994.  In June 1995, Williams was photographed by the press partying with Oasis at the Glastonbury Festival. During this month the band offered him an ultimatum; he was to adhere to the band's responsibilities or leave before their scheduled world tour. Williams chose the latter. Orange pressured Williams to quit because of Williams's behavior. Williams claimed he was bored with Barlow's leadership and jealous of Barlow. Despite the loss of Williams, Take That continued to promote Nobody Else as a four-piece, scoring a further hit single with Donald's "Never Forget". They subsequently went to America and completed the Nobody Else Tour in October 1995. Following the tour, the band began to plan for their next album; however, when they spent Christmas together, they mutually agreed it was time to part ways.  On 13 February 1996, Take That formally announced that they were disbanding. This was followed by the Greatest Hits compilation in 1996, which contained a new recording, a cover of the Bee Gees' "How Deep Is Your Love". The single went on to become what was to be the band's final UK number one until their 2006 comeback a decade later. Take That gave what was thought to be their final performance in April 1996 at Amsterdam. Following the band's announcement, millions of their fans were distraught around the world and in the UK alone, teenage girls threatened suicide and were seen lining streets in tears, to the point that telephone hotlines were set up by the government to deal with counselling them. After the band broke up, highly respected music figures such as Elton John noted that Take That were different from other boy bands before and after them, in that they wrote their own material through Gary Barlow, the only boy band member who won an Ivor Novello award during his time in a boy band (although George Michael won it while in Wham!). Take That had also left a legacy of being immaculate performers with a very high work ethic, causing them to be voted in as the greatest boy band of all time.

When did they release their greatest hits?
This was followed by the Greatest Hits compilation in 1996,