Corbyn's reason for not attending.
"Mr Corbyn was invited to attend but declined, telling SNP Westminster leader Ian Blackford in a letter that he was wrong to suggest the single market “is a membership club”.
The Labour leader wrote: “Your proposed summit appears to be based on the flawed assumption that the single market is a membership club – it is not.
“We have consistently said that we are committed to negotiating to keep the benefits of the single market and securing the best possible deal for the whole of Britain, which protects the economy and the people of this country, whilst at the same time respecting the result of the referendum.
“Therefore, Labour will not attend your meeting.” "