DISGRUNTLED Rangers fans are writing to the club's biggest investors appealing for their help to force boardroom changes.

The Sons of Struth group says it will write to Rangers' top 50 investors and plead with them to back supporters' calls.

Rangers will stage their long-awaited ­annual general meeting on Thursday, December 19, where a bitter boardroom battle will culminate.

Sons of Struth spokesman Craig Houston said: "We're saying to the major investors: 'Don't turn your backs on the fans'.

"Working with all the organised fan groups and the response we had from the fans in the stands shows without doubt that the board as currently composed does not enjoy popular support.

"To protect their ­investment and for the club to flourish the ­investors have to stand with the fans.

"It's time for change."

The fans' group ­organised a red-card protest at Ibrox against the current directors during Saturday's 3-0 win over Ayr United.

In their letter to ­investors controlling around 90% of the club's shares, the group will ask them to "stand with the vast and ­overwhelming majority of the fans".

The Sons of Struth urged investors to "recognise the strength of feeling among Rangers' support about the way the club is being run".

New chairman David Somers, chief executive Graham Wallace, ­fin­ance director Brian Stockbridge and non-executive director James Easdale all face a re-election vote.

But four other rebel shareholders - Paul Murray, Malcolm Murray, Scott Murdoch and Alex Wilson - will also have their bid to bec­ome directors decided upon by stakeholders.

Thousands of fans held up red cards supplied by the Sons of Struth on Saturday.