Hereford chairman David Keyte told the Bulls website: "I appreciate that some fans will be disappointed but Mathieu made it very clear to us this week that he didn't want to be with us and wanted to leave.
"There was no way he was going to sign a new contract at the end of the season which means he would have been free to go to another club and we would have been in the hands of a tribunal. It's a good deal for this club."
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