A sitting UK prime minister, backed by Rayner, is reopening free movement with the EU, which would change UK-EU migration and labour policy, although so far he only wants a discussion.

Its ripple abroad: labour and migrant flows between the UK and EU, plus UK-EU relations, reaching France, Germany, Ireland, Poland.

Backed by 3 headlines from 2 outlets. Added by the pipeline after a ripple test, not yet checked by a person.