rejoiner

noun

1. One who joins (an organisation, etc.) again.
2. A brief introduction to a radio show, etc. when it continues after a commercial or other break.
3. (UK)Someone who wants the United Kingdom to join the European Union again.

   “All these obstacles are real. None can be wished away. Which is why rejoiners need to look to the likes of [Nigel] Farage and [John] Redwood for inspiration.”