Forgive me if I am wrong but this comes across as a weird non-article that mentions no specific demonstrations that have taken place at detention centres even though these have been reported in detail on Indymedia before. Is this an attempt by Alliance for Workers Liberty (AWL or Workers' Liberty) to yet again advertise its party via its non-website Barbed Wire Britain  http://www.workersliberty.org/node/2595 that seems to have little content apart from the addresses of the detention centres (this article has two links to the BWB website).
So typical of the authoritarian Left.

BWB is not a front organisation for Woker's Libety, that's bollocks.

Since this intro-article for the imc uk migration page was written, the uk noborders network has set up a very informative and up to date website:
 http://noborders.org.uk/

No Borders Brighton -  http://nobordersbrighton.blogspot.com/
No Borders Bristol -  http://bristolnoborders.wordpress.com/
No Borders London -  http://london.noborders.org.uk/
No Borders Manchester -  http://www.nobordersmanchester.blogspot.com/
No Borders North East -  http://nobordersnortheast.wordpress.com/
No Borders Nottingham -  http://www.nobordersnottingham.org.uk/
No Borders Scotland -  http://www.noborderscotland.org.uk/
No Borders South Wales -  http://noborderswales.org.uk/

C.A.I.C. -  http://caic.org.uk/
No One is Illegal -  http://noii.org.uk/
Stop Deportation -  http://stopdeportation.net/