Bessemer Trust, the management firm appointed co-conservator of the singer’s finances, has stepped down from its role in the conservatorship.

As Britney Spears' legal battle with her father rages on, another aspect of the court case has developed. The management firm attached as co-conservator of the pop star's finances will no longer take part in her conservatorship alongside her father, Jamie Spears.

Californian company Bessemer Trust has filed court documents in Los Angeles, asking to be withdrawn due to "changed circumstances".

The court filing reads: "As a result of the Conservatee’s testimony at the June 23 hearing, however, Petitioner has become aware that the Conservatee objects to the continuance of her Conservatorship and desires to terminate the Conservatorship. Petitioner has heard the Conservatee and respects her wishes."

Bessemer Trust, which was appointed the role last November, asked the court to "approve its resignation on an expedited basis". The firm had been waiting on paperwork before it could act on its role in the conservatorship, which was only filed this week.

This is the latest development in the Britney Spears conservatorship battle. In court filings issued previously, the 39-year-old wanted Bessemer Trust appointed as "sole conservator". Earlier this week, however, Judge Brenda Penny refused the request, and Jamie Spears remains solely in control of her assets.

Since 2008, Britney Spears has been embroiled in the conservatorship which sees her father having a monopoly over her finances. The #FreeBritney movement has been a huge talking point within the past year in particular, with the 'Framing Britney Spears' documentary further fuelling the spotlight on the singer.

In her emotional plea in court this past June, the star called for an end to her "abusive" conservatorship, revealing she was prevented from removing an IUD birth control device, and had been prescribed a number of mood-altering drugs and numerous appointments with psychiatrists each week.