On tuition fees, Mr Clegg stopped short of saying it was one of his biggest political regrets, but said he regretted that it was a pre-election promise which the party could not deliver on.
In an interview with the Sunday Telegraph, he said he regretted the way he had handled it after reviewing the initial police investigation which led to the conviction of private investigator Glenn Mulcaire in 2007.
In April he told a reporter with The American Prospect that he regretted the 2001 study and the effect it had on the gay community, and that he owed the community an apology.
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Asked if he regretted the appointment, Cameron acknowledged it had come back to haunt both him and Coulson.
He said the organisers regretted what happened and that it had overshadowed a very important discussion.
And he said something else here that was intriguing: he said he regretted returning to cycling in 2009, suggesting it had possibly set into motion the chain of events that led him to his professional humiliation, a lifetime ban from competition and the hot light of this hotel suite.
He said the company very much regretted the decision and it was no reflection on the workforce.
But he admitted once again that he regretted the tough rhetoric he had used in the run-up to the conflict which had made it appear he was eager to go to war.
He gave them 15 minutes of his time, and soon regretted it.
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He said he regretted signing the contract to provide security for the Olympics telling MPs it was a "huge logistical challenge" to supply 10, 000 staff.
Furiously mincing his words, Mr Hoon said he regretted her husband's death, but hasn't apologised for it.
Although he accepted that the government was not attempting a stealthy privatisation of the NHS, he said it could be a "catastrophic policy" which might be "regretted" in the future.
He said he regretted the decision to re-mortgage at the taxpayer's expense, describing it as a "bad judgement", while stressing that he had acted entirely within the rules.
Whilst many of us have been caught out sending private emails to the wrong people, or have even regretted sending a tweet the next morning, it seems Mr Huhne mistook the form of the message he was sending.
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