Was Gordon Brown that swift to take revenge

Barely hours after Peter Mandelson said he would be willing to serve under a Conservative government for the good of the Country, I read that

"Business Secretary Lord Mandelson was initially refused entry to the Labour Party conference in Brighton because of a problem with his security pass.

A security guard called a police sergeant to verify his credentials, BBC political correspondent Laura Kuenssberg said.

Lord Mandelson had to wait 10 minutes at the conference's security entrance before he was allowed to enter. "

That'll teach him to upset Gordon.