The Carlisle United Official Supporters' Club insist "progress" is being made on investment talks at Brunton Park.

The fans' group, who own 25.4 per cent of United's holding company, told members tonight that "constructive" talks have been held with a potential overseas investor.

CUOSC added that a detailed formal proposal would "hopefully" emerge "before too long".

But there still remains no deal on the table on the 570th day of the mystery "billionaire" saga.

In a briefing issued to members, CUOSC referred to the discussions involving three of their board members as well as United's other co-owners aimed at "drawing in significant new investment".

These talks, over several weeks, "have been constructive and positive", they said.

"They have involved at various points the potential overseas investor and/or his representatives," the briefing continued.

"CUOSC is fully engaged in the process and this reflects its level of shareholding in the club.

"Progress is being made on investment possibilities. This will hopefully result in a detailed formal proposal being developed before too long which is as right for the future of the club as possible and can be supported by all those connected to or interested in Carlisle United."

CUOSC said they could not divulge the finer details of discussions but pledged to keep members informed.

It is more than two months since the Blues hierarchy last commented publicly on the "billionaire" situation.

Then, chief executive Nigel Clibbens said the club's "foot remains on the gas" with the unnamed foreign suitor and that he wanted to see more progress "quickly".

This followed face-to-face meetings with the mystery party in Carlisle.

There have now been two such visits, as well as separate talks with his agent, according to notes from a recent Carlisle United Supporters' Groups meeting.

That gathering of the Blues' various fan groups on December 1 was told by Clibbens that no deadline had been set for proposals from the would-be investor, "but each part of it was being managed to ensure progress was made".

A CUOSC board meeting on the previous day was told that progress in the investment talks "had been relatively slow, but its pace was now quickening somewhat."

Further meetings were expected to take place over the next couple of weeks, it added.

It was on May 19 last year that United first announced a "genuine and firm" approach by the mystery individual who apparently had plans to help fund the club for the next "three to five years".