The Hague Contracting States
The “Hague Contracting States” are the parties to The Hague Convention of 30 June 2005 on Choice of Court Agreements, being:
The EU Member States*, Mexico, Montenegro and Singapore (the latter three each being a “non-EU Hague State”).
*= As from 11pm (UK time) on 31 January 2020 the UK will no longer be an EU Member State. However, for the duration of the transition period under the UK/EU Withdrawal Agreement (which, conservatively, should be assumed will end at 11pm (UK time) on 31 December 2020), the UK will continue to apply EU Law (which includes the Hague Convention) and the other EU Member States will continue to treat the UK as an EU Member State for such purposes. Whether, during that period, the non-EU Hague States, will continue to regard the UK as a Hague Contracting State will, however, be a matter for them (as they are not party to the Withdrawal Agreement). For more detail on what Brexit means for choices of jurisdiction (in particular those in favour of the English courts) see Brexit Implications.