A senior SNP minister has ruled out campaigning with David Mundell to keep Scotland in the EU.

Mr Mundell told ministers that, if the package of reforms goes ahead, he would 'be delighted' to campaign with Alex Salmond and Nicola Sturgeon to keep Scotland in the EU.

The Scottish Secretary made the declaration after the SNP's Westminster leader, Angus Robertson,  asked him to personally campaign for Britain and Scotland to stay in the EU.

He told Mr Robertson: "I'll make my position known when the negotiations have been concluded.

"But I make this offer to you - if the reform package goes ahead and if I am campaigning to keep Scotland in the European Union, I'd be delighted to join you, (Alex Salmond, SNP MP for Gordon) and the First Minister on a platform to make that case."

However, Humza Yousaf has ruled out a partnership between the SNP and Mr Mundell on Twitter, stating the party will make its own positive case for remaining in the EU.

He said: "You're (David Mundell) okay thanks. The SNP will make our own positive case staying in an EU that strengthens social protections."

Nicola Sturgeon, Carwyn Jones and Arlene Foster sent a joint letter to David Cameron last week asking him not to hold the referendum in June.

The First Ministers of Scotland, Wales and Northern Ireland said that running an EU referendum campaign during the Scottish, Welsh and Northern Irish elections 'risks confusing issues at a moment when clarity if required'.

The letter was also signed by Northern Ireland's deputy first minister Martin McGuinness.

However, Mr Cameron rejected the demand, committing to a gap of at least six weeks after the May 5 elections before holding the referendum - leaving open the possibility of a vote on June 23 or 30.