Reading-based London Irish are looking into a possible move back to London.
Irish, who were relegated from the Premiership at the end of last season, moved from their original home of Sunbury in Surrey, to the Madejksi Stadium in 1998.
And despite playing their home games in Reading the senior squad has continued to train at Sunbury, with the youth teams and senior academy playing home games there.
The club on Monday released a statement to its fans, revealing that talks had taken place with Brentford Football Club.
“Over the past decade London Irish has been linked with a number of possible stadium developments in London as the club kept the possibility of returning to its roots in the capital under consideration.
“Numerous discussions have taken place with a variety of clubs over the last five years with a view to a possible ground share or joint stadium development.
“Brentford Football Club, who are well advanced with their own plans for a new 20,000 seat stadium in west London, is one of the clubs concerned.
“As an initial step in assessing this option, London Irish has today (August 15) begun formal discussions with the London Borough of Hounslow to explore the potential to play rugby at the new stadium.”
Formed in 1898 the club boasts a rich history and has produced current English internationals such as Jonathan Joseph, Anthony Watson and Marland Yarde. But one of the founding members of the Premiership is facing darker days.
The 2008/09 Premiership and 2005/06 European Challenge Cup runners-up endured a torrid 2015/16 season, winning only four games and being relegated from the top flight for the first time since 1994.
Hefin Jones, Pundit Arena