Heidi Alexander has written in the HuffPost how she feels that it seems more and more MPs are accepting the idea of staying in the single market post Brexit. https://www.huffingtonpost.co.uk/entry/single-market-westminster_uk_5aba58efe4b008c9e5fbaa30
Brexit: Single Market – Multiple Statements
It looks as though everyone on the Labour frontbench is starting to say the same thing - membership of the single market post-Brexit is possible. Everyone that is except Jeremy Corbyn. https://labourlist.org/2017/07/option-of-staying-in-the-single-market-still-on-the-table-for-labour-says-abbott/
Brexit: Disagreements in the Labour Party
Heidi Alexander MP (Lewisham East - Lab) has written, in the Guardian, her thoughts on Barry Gardiner MP's (Brent North - Lab) recent comments regarding access to the Single Market and Customs Union https://www.theguardian.com/commentisfree/2017/jul/25/labour-single-market-barry-gardiner-customs-union
Brexit: Single Market Conundrum
Stephen Bush mulls over the question that was seemingly posed on the Andrew Marr show on Sunday - does Brexit mean leaving the Single Market? http://www.newstatesman.com/politics/staggers/2017/07/what-jeremy-corbyn-gets-right-about-single-market