“Labour’s six tests include a comprehensive trade agreement as well as continued co-operation on science, security, research and technology. The party argues that it is reasonable to demand a deal that provides the “exact same benefits” from Europe as EU membership — given that the phrase was first used by David Davis, former Brexit secretary” Quoted from here: https://www.ft.com/content/31653510-b6a6-11e8-b3ef-799c8613f4a1 Obvs these Labour rebels could collectively shit themselves again but it seems a cogent strategy for forcing a collapse of the government. Whether Labour would win that remains to be seen.