A revamped Anglo-Welsh Cup or an expanded Guinness Premiership are the options being pursued by the leading clubs as they look at ways of increasing their number of home fixtures, and revenue, after Twickenham's refusal to sanction six extra league games a season.

The Premiership owners, who between them are looking at losses of around £25m this season, met this week and will make one final push to persuade the Rugby Football Union that playing 28 matches in the regular league season would not compromise player welfare or impact on international rugby.

Knowing the call will be made in vain, they have drawn up contingency plans. A number of owners want the Premiership to be increased to 14 clubs, providing an extra two home matches a season. It would mean spreading the central division of money two more ways, but the majority of clubs, who hold what is called a "p-share" in Premier Rugby, would face only a £40,000 shortfall.

The other idea that will be presented to the RFU when the two sides meet within the next week will be to continue with the Anglo-Welsh Cup but not in its current form. The Premiership clubs want it to be enhanced so that it provides more than three home fixtures every two seasons with the knockout rounds played towards the end of the season.

The tournament is currently split into four pools of four sides, one Welsh region in each, who play each other once. One option is to have two groups of eight with at least one match played pre-season and the others during the international windows.

"We have always said that we want the Anglo-Welsh tournament to continue and we would welcome any discussions with the Premiership clubs and the RFU," said Roger Lewis, the chief executive of the Welsh Rugby Union.

The RFU will decide later this month whether to bid to stage the 2015 World Cup. It would be up against Italy, South Africa and Japan, who have all secured government backing. The host nation will have to guarantee the tournament organisers £80m and its only revenue would come from ticket sales.

The RFU has been number-crunching for the last couple of months but time is running out with the International Rugby Board due to make a decision on both the 2015 and 2019 hosts at its council meeting next month.