Aides to the Chancellor have said that he had not entertained any major donors at his Downing Street residence, following allegations that special privileges were given to donors who gave money.
However, Andrew Feldman, Simon Wolfson and Howard Leigh had been to Dorneywood for social events as part of wider groups.
Labour has raced into a poll lead as the Tories deal with fall-out from the Budget and the cash-for-access controversy, a survey shows.
The Tories have released a list of party donors who attended a lunch with the PM, with Labour calling for an independent inquiry.
A look at the Conservative party donations and who paid them