Sue Gray
A No10 source confirmed to HuffPost UK the call had been delayed and they were looking for "another date".
A succession of Conservative MPs notably failed to give the PM their support.
They include a birthday party on June 19 thrown by his wife as a surprise get-together - complete with cake and up to 30 guests.
"RIP Wine Time Fridays."
The senior civil servant points finger at Number 10 over 'inappropriate' gatherings
The senior civil servant's inquiry into partygate isn't the only thing on the PM's plate.
"I suppose like thousands of others with their own stories, I’m angry."
"Cressida Dick with injury time winner for govt."
Downing Street has been forced to deny the prime minister is paralysed by ongoing controversy.
Joe Lycett's Ridiculous Sue Gray Parody 'Report' Is Here To Tide Us Over Until We Get The Real Thing
"Hard to see how the PM can cling on after this," he joked.