Scottish Liberal Democrats leader, Willie Rennie, has called for the Scottish National Party to "put their money where their mouth" is and join his party in campaigning for a second Brexit referendum.
Speaking to Julia Hartley-Brewer on the breakfast show, the MSP claimed the SNP was "primarily interested" in Scottish independence, not the EU.
"They've claimed to be very pro-European. They want to stand up for the country's place in Europe but when it comes to the big opportunity, the big chance, the chance that's gaining momentum they sit on the fence. It's about time they got off the fence and actually put their money where their mouth was and back this big campaign for the British people to have the final say in the deal," he said.
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"They're primarily interested in independence, it always has been. All these arguments that they're suddenly pro-European to their core don't really wash so we're calling them out. We're saying if you really believe in Europe if you want to get all these people on your side who are pro-European you're going to have to prove it."
Hartley-Brewer asked the politician why he wasn't interested in a second referendum on indepence, but was backing another Brexit vote.
'Get off the fence, back this deal or just shut up'
"We decided for independence not to have that, to not even start the process. With Brexit we started it," Mr Rennie said.
"We didn't know what the deal would be like when we voted for it in 2016, we don't even know now. There are millions of people in this country who don't want to just accept what Theresa May comes forward with. They want to have the final say on something that's probably the biggest vote this country has face in a generation. This is a democratic way of concluding a big process that's going to have a big impact on the economy."
He added: "I think we should send a clear message to the SNP. Get off the fence, back this deal or just shut up."