So it is arguing that it wants to retain the same benefits as single market membership - such as tariff - free trade. (bbc.com)
The key word there is «possible»: what is possible is contingent on the higher priorities, and full Single Market membership is not possible given those priorities. (totalpolitics.com)
First she got rid of talk about single market membership, calling it a «moot point». (politics.co.uk)