A group of IT workers from Liverpool have won a £45.5 million share of the Euromillions jackpot, sources said.
The syndicate of seven or eight staff were unaware they had won when they turned up for work at BT's Royal House centre in Wood Street.
They held one of two tickets that scooped a share of Friday night's £91 million jackpot.
A company source said: "The lucky people do work in our Wood Street centre in Liverpool. They are employed by Hewlett Packard or by Manpower to do internal IT work, computer support.
"Some of them went to work not actually knowing anything about it. Someone from Camelot turned up and whisked them away."
A spokesman for Camelot said: "Camelot can neither confirm or deny rumours of any winners."