British Prime Minister David Cameron said on Saturday he should have handled scrutiny of his family's tax arrangements better and promised to learn the lessons after days of negative media coverage and calls for his resignation.

After four days and four different statements over his late father's inclusion in the "Panama Papers", Cameron said on Thursday he once had a stake in his father's offshore trust and had profited from it, spurring calls for the leader to resign.

"Well, it's not been a great week," Cameron said on Saturday, speaking in London at a meeting of members of his Conservative Party. "I know that I should have handled this better, I could have handled this better. I know there are lessons to learn and I will learn them."

David Cameron Britain's Prime Minister, David Cameron, arrives to address the Conservative Spring Forum in central London, Britain April 9, 2016. Photo: REUTERS/Neil Hall