The title of this post is a reference both to the excellent organisation, Bail for Immigration Detainees (BID to its friends) and to the underlying concept. BID helps immigration detainees make bail applications and works with the Free Representation Unit to get (mainly) barristers to do pro bono lists of bail cases at the major hearing centres, mainly Taylor House near Angel in London, York House near Heathrow and Newport, where Campsfield Detention Centre bail applications are heard.
https://www.freemovement.org.uk/bail-for-immigration-detainees/