Conversation so far:
when was Charles Kennedy resignation?
On January 7, 2006
why did Charles Kennedy resign on January 7, 2006?
Charles Kennedy . was informed that ITN would be reporting that he had received treatment for alcoholism; he pre-empted the broadcast by admitting that he had had treatment
did Charles Kennedy have any other reasons besides being informed that ITN would be reporting that he had received treatment for alcoholism; he pre-empted the broadcast by admitting that he had had treatment?
This admission damaged Charles Kennedy standing; 25 MPs signed a statement urging him to resign immediately

Question: what did he do after his resignation?
Self-contained rewrite: what did Charles Kennedy do after his resignation after his admission to the treatment?