As Theresa May faced off against Jeremy Corbyn at Prime Minister's Questions, one of her key adversaries in Brussels faced an even tougher grilling.
Donald Tusk, president of the European Council and a frequent critic of Britain in light of Brexit, was greeted by an angry mob at Warsaw train station on his way to testify in a an investigation relating to Polish intelligence agents.
The probe relates to communication between Poland's military counter-intelligence agency (SKW) and foreign intelligence officials following the death of then-president Lech Kaczynski in a plane crash in 2010.
Mr Tusk was president when the communications took place. It is alleged that the correspondence took place without Mr Tusk's consent, but SKW claims he had authorised it.
Mr Tusk is not subject to any allegations, but was due to appear before the inquiry as a witness.
Alongside Mr Tusk's critics, a group of supporters also gathered at the station, carrying EU flags and chanting "Donald, we are with you" according to the Associated Press.
Ahead of his appearance at the inquiry, Mr Tusk said he was the victim of a "political witch hunt." Poland is currently led by Lech Kaczynski's twin-brother, the nationalist Jaroslaw Kaczynski, who has brought Poland's prosecutors under the direct control of the government, and critics suggest there is a wider agenda to belittle the former president.
“Donald Tusk is being dragged into this investigation for political reasons with the aim of humiliating him,” Jan Grabiec, a member of Tusk's Civic Platform party, was quoted by the Express as saying.