If no agreement is reached by that date, the UK will leave the single market on 1 January 2021 without a trade agreement. The Withdrawal Agreement also contains provisions obliging the United Kingdom to leave the Agreement establishing the Statute for the European Schools, with the United Kingdom being subject to an obligation for the Convention and the accompanying rules for accredited European Schools until the end of the last academic year of the transition period.dem, i.e. the end of the 2020-2021 spring semester.  This ensures that the UK will respect EU agreements on climate, environment and workers` rights in a future trade agreement. Immediately after the announcement of a revised withdrawal agreement on 17 October 2019, Labour, the Liberal Democrats and the DUP declared that they could not support the new agreement.