The former Arsenal director Lady Bracewell-Smith has hinted at sexism in the Arsenal boardroom and claimed that the club's current board members should be sacked and replaced by a more "dynamic, pro-active younger board".

Bracewell-Smith, who left the north London club in December 2008 and in April sold her 15.9% holding to Stan Kroenke, paving the way for the American to launch a full-blown takeover, said on Twitter: "I agree that current board should all go. They are passé. Have nothing more to give to the club at all. In time we will need a more dynamic pro-active, younger board, and a good directional leadership."

Some of the comments appear to have been removed since first publication but Bracewell-Smith also claimed that board members "couldn't handle a woman with power on the board. Felt insecure. Male chauvinism".

Bracewell-Smith claimed she was "caught in the cross fire" of a "war" between the former Arsenal vice-chairman David Dein, who left the club in 2007, and the late director Danny Fiszman.

She rejected calls from some fans for the return of Dein, linked to Alisher Usmanov's Red & White Holdings group, who are the club's second largest shareholders, claiming he was "the root cause of all the troubles at AFC" and was "unable to work with other board members".

However, today she posted a clarification, adding: "I stand corrected. Dein loves the club and although sometimes personalities fall out, his contribution at Arsenal has been immense."