He joined Rushden & Diamonds on loan in March 2001, but failed to make a first team appearance for them and was released by Barnet at the end of the season.
Although he began the following season as second-choice, he regained his place in the side and went on to win the Hayes Supporters' Player of the Year Award in 2003.
In the midst of this he had also become the first Hayes goalkeeper to score a goal, with a last-minute header in the game away to St Albans City.
He played just five more times that season, including the victory at home to Premier League side Charlton Athletic in the FA Cup.
[citation needed] After being released by Walsall, Bossu then went on trial with Scottish Premier League side Aberdeen.