However, the situation suddenly changed when Sweyn died on 3 February 1014. The crews of the Danish ships in the Trent, who had previously supported Sweyn, immediately swore their allegiance to his son Cnut; but leading English noblemen sent a proposal to Æthelred to negotiate Æthelred's restoration to the throne. He was required to declare his loyalty to the noblemen, to bring in reforms regarding everything that they previously disliked, and to forgive all that had been said and done against him in his previous reign. Æthelred soon regained his throne with assistance from Olaf Haraldsson; Cnut went back to Denmark, while his allies were punished for their cooperation with him.