The phrase "to leave the bloc" means that a country or group is choosing to exit an alliance, agreement, or organization they were previously a part of. Full definition
The Financial Times reported Monday that «the U.K. is starting to recognize that it will have to keep Britain under the remit of some EU agencies after leaving the bloc in 2019.» (canadianbusiness.com)
Britain and the EU want to strike an overall Brexit agreement by October, so EU parliaments have time to ratify it before Britain leaves the bloc on March 29, 2019. (cnbc.com)
Adrian Hilton, a proponent of the process, said missional projects and dialogue between churches and their European counterparts will continue undisturbed once the UK leaves the bloc. (premierchristianity.com)