Rishi Sunak mocked the SNP by saying his party will "motor on with the job" during Prime Minister's Questions.
Sunak was referring to the £110,000 motorhome which was seized as part of the investigation into the SNP's finances.
The state-of-the-art "battle bus" was taken from the home of former party CEO Peter Murrell's mother.
SNP Westminster leader Stephen Flynn was met with a wall of heckles as he rose to speak at Prime Minister’s Questions, following the investigation which has seen Murrell and party treasurer Colin Beattie arrested.
He smiled as he waited for the jeers to die down.
Flynn said: “I’m delighted to hear that they had an equally peaceful and relaxing Easter break as I did.”
He asked: “Was it their refusal to stand alongside striking workers on the picket line, their acceptance of the economic damage being caused by Brexit, or perhaps their support for denying the people of Scotland the right to choose their own future which led to the leader of the Scottish Conservative Party urging voters to back Labour?”
Sunak replied: “What we’re doing is not getting distracted by the things that are going on elsewhere. And we’re focused on delivering for the people of Scotland.
“Now I know at the moment him and his party are focused on other matters. We’re just going to motor on with the job.”
Sunak also asked how the SNP could “fix the mess” he claimed Sturgeon left Scotland in if they could do not do the same for their own party.
Flynn said: “We will take no lectures from a party which has not had a mandate to govern in Scotland since 1955. You went through three prime ministers in the course of just a matter of months.
“You crashed the economy, you sent mortgage rates soaring, you have taken energy support away from families most in need. Now the Prime Minister has been fined… not once but twice.”
He added: “The leader of the Scottish Conservatives believes that the people of Scotland should return Labour Party members of Parliament to this House rather than Scottish National Party members… so isn’t the message to the people of Scotland quite clear: don’t give the Tories what they want.”
Sunak said: “The Scottish Conservatives deserve enormous praise for forcing the SNP into abandoning their completely unworkable, fundamentally flawed deposit return scheme.”
He added: “We look forward to working with them on delivering something that actually works to deliver of the people of Scotland… if (the SNP) can’t fix the mess that Nicola Sturgeon left their party in, how can they possibly fix the mess that she left Scotland in?”
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