3 See Crowley, Meredith, Oliver Exton and Lu Han (2018), “Renegotiation of Trade Agreements and Firm Exporting  Decisions: Evidence from the Impact of Brexit on UK Exports,” mimeo, University of Cambridge. Douch, Mustapha, Edwards T. Huw and Christian Soegaard (2018), “The Trade Effects of the Brexit Announcement Shock,” The Warwick Economics Research Paper Series 1176.
4 The Central Bank of Ireland has been processing applications for authorisations of new entities or the  expansion of activities by existing entities. It is imperative that firms that have not yet activated Brexit plans do so as soon as possible, given the limited time window before the end of March and the importance of having valid authorisations for all scenarios.