The organisations listed here will be those working in support of rejoining the EU, firstly those subject to a detailed agreement on access to the data in the Register, and secondly those helping promote the Register. If there's one in the first category that you don't want to hear from you can unsubscribe individually by following the link provided in their emails.
In the early days after 1 January 2021 we expect many organisations to allow time for the reality of Brexit to sink in before they actively campaign to rejoin the EU. Others will favour stepping stone options for the current climate of opinion. Registering the support for Rejoin is a long-term project which will place an important factual marker on the public debate. As time goes by we expect more and more national organisations to appear here as registered or supporter organisations.