Mark Warburton has resigned as Rangers manager, the Scottish Premiership club announced on Friday, as the Glasgow giants continue to struggle in the shadow of bitter city rivals Celtic.

Warburton's future had been in doubt for several days amid growing unrest at Rangers' failure to mount a strong challenge for the title.

The Ibrox outfit trail leaders Celtic by 27 points after winning just one of their last five league matches.

"Rangers has accepted the resignations of manager Mark Warburton, assistant manager David Weir and the Club's head of recruitment Frank McParland," a statement on the club's website read.

"At a meeting with the management team's representative earlier this week the Club were advised that Mr Warburton, Mr Weir and Mr McParland wished to resign their positions and leave the Club on condition that Rangers agreed to waive its rights to substantial compensation."