Rwanda
Zia Yusuf even lashed out at the lack of representation of Reform voters in the audience.
Sir John Major also described it as "un-Conservative, un-Christian and unconscionable".
The senior Tory has repeatedly failed to deny using the term to describe the controversial policy.
Fees doubled in the Conservatives' last 12 months in charge, partly because of the failed Rwanda scheme.
The former immigration minister is in the running to be the new Tory leader.
Robert Jenrick got £7,920, also tax-free.
It begs the question: Why didn't Rishi Sunak hold off calling the general election?
Keir Starmer also poured cold water on the failed policy, saying the UK would "not ever" leave the ECHR.
New home secretary launches probe into the hundreds of millions of pounds spent on the disastrous policy.
The main target of festival-goers' mockery? The Tories, of course.