Rangers and Celtic have written to the 10 other Scottish Premier League sides with a view to ending the top-flight feud.

But the Old Firm's latest proposals have already been dismissed by some rival club chairmen ahead of a crucial meeting on Friday.

Ten clubs handed in their resignation from the league at the start of the season and are now serving a two-year notice period.

Relations between the Old Firm and the rest of the league have been strained since the collapse of a proposed SPL TV pay-per-view venture, which was vetoed by the Glasgow giants in April.

We believe our proposals are constructive Rangers chairman John McClelland

The clubs had been squabbling about a voting system that requires a majority of 11-1, which the 10 want to change, and over the distribution of television money.

Now Rangers chairman McClelland and his Parkhead counterpart in negotiations, chief executive Ian McLeod, have written to both the SPL and the 10.

The rebel clubs are set to meet on Friday to discuss the proposals.

McClelland told his club's website: "Rangers and Celtic have made some proposals to the SPL about changing the existing rules and we have sent copies to the other 10 clubs.

"We believe our proposals are constructive and that we have responded to a number of the concerns of the other 10 clubs."

But Dunfermline Athletic chairman John Yorkston has told BBC Scotland that a breakthrough is unlikely on Friday.

While the Old Firm have agreed to an 8-4 majority for some issues, Yorkston believes that there are too many points that would still require an 11-1 vote.

It has taken three-and-a-half months to respond to a paper Spokesman for the 10

The other clubs have become frustrated at the length of time taken by the Old Firm to respond to their own proposals issued in August.

A spokesman for the 10 said: "The Old Firm's response to the paper, which was produced three-and-a-half months ago by the 10, will be considered before anything else is decided or said.

"But it has taken three-and-a-half months to respond to a paper which was given to them."

Celtic and Rangers have, in the meantime, seen their dreams of moving to English football come to an end.

Their attempts to escape Scottish football had become more desperate after Sky television decided not to renew its contract with the SPL.

BBC Scotland picked up the television rights for SPL games in the summer just days before the season started.