A man is due in court after Deputy Prime Minister Nick Clegg was splattered with blue paint at a meeting with grassroots members of his party.
The 22-year-old was arrested and questioned by police following the attack on Mr Clegg in Glasgow on Thursday night.
The Liberal Democrat leader was splashed with blue paint, along with the leader of the Scottish party, Willie Rennie.
Mr Clegg later made light of the incident, saying it was "no big deal".
The protester was held by police and is due to appear at Glasgow Sheriff Court today in connection with the attack.
He is being held in connection with an alleged breach of the peace and police assault.