Prof Cathryn Costello's Avatar

Prof Cathryn Costello

@profccostello.bsky.social

Full Prof of Global Refugee and Migration Law, Sutherland School of Law, UCD; ex-Refugee Studies Centre, University of Oxford; ex-Centre for Fundamental Rights, Hertie School, Berlin. Recent return migrant after two decades.

799 Followers  |  1,771 Following  |  57 Posts  |  Joined: 15.03.2025  |  2.019

Latest posts by profccostello.bsky.social on Bluesky

Woke up to this. A city I love, making a great choice!

05.11.2025 06:57 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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A few flashlights from my latest open access publication with @judithkohlenberger.bsky.social and @bernd-parusel.bsky.social in the European Journal of Migration and Law: (1/4)

brill.com/view/journal...

26.10.2025 15:10 β€” πŸ‘ 8    πŸ” 5    πŸ’¬ 1    πŸ“Œ 0
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Tremendous event 26 November between @northeasternu.bsky.social and @ucddublin.bsky.social - where can we see positive international collaboration even during an era of fragmentation and polarisation? Join us. Contact @bentonra.bsky.social for event registration and feel free to share widely.

24.10.2025 13:34 β€” πŸ‘ 3    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0

Not good enough. This needs investigation and consequences.

22.10.2025 17:10 β€” πŸ‘ 4    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Preview
Addressing the trafficking of women migrant workers in poorly regulated sectors | SiobhΓ‘n Mullally Our new joint Policy brief, just published with UN Women, addressing trafficking of women migrant workers in sectors such as agriculture, fisheries, domestic work, hospitality and garment production. ...

Joint policy brief on the trafficking of migrant women workers in poorly regulated sectors, by the UN Special Rapporteur on trafficking in people (Siobhan Mullally) and UNWomen - www.linkedin.com/posts/siobh%...

21.10.2025 14:35 β€” πŸ‘ 10    πŸ” 6    πŸ’¬ 1    πŸ“Œ 0

Never hear about events in my home town Tralee til after the event! Take note #speirgorm Will turn up! Looks great Tedx Tralee!

19.10.2025 12:03 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

My post with Sebastian VM on #WesternSahara: does the Commission's new agreement respect the requirements established by the #CJEU in October 2024? In short: nope!

17.10.2025 17:41 β€” πŸ‘ 2    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0

Thanks @svaroschi.bsky.social and @mariafarrell.bsky.social I have now read this blistering piece with relish. Highly recommended!

17.10.2025 17:23 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Without a shift in policy, the dominant trajectory of technology in immigration will continue to be digital surveillance. It doesn't have to be that way.

Very glad to talk about our global research on technology and alternatives to detention on @techpolicypress.bsky.social.

23.09.2025 14:41 β€” πŸ‘ 33    πŸ” 20    πŸ’¬ 1    πŸ“Œ 0

Looking forward to reading - migration controls - always a weak spot for human rights - now in full autocratic mode ..

17.10.2025 15:28 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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My book, out now! On migration law's treatment of women, gender-based violence, and the legal challenges that migrant women have brought to the rules that determine their status. I have links if you want to review a copy or read a free chapter....

global.oup.com/academic/pro...

02.10.2025 13:13 β€” πŸ‘ 49    πŸ” 18    πŸ’¬ 2    πŸ“Œ 0

Huge congrats! It sounds wonderful. CC

10.10.2025 17:41 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

The Wolfson Report treats #NorthernIreland and the international legal commitments of the UK Government - which are very clearly spelled out in the #1998Agreement - as mere political agreements.
Once again it is a Treaty & requires #ECHR rights - not UK versions of them
1/3

06.10.2025 08:28 β€” πŸ‘ 20    πŸ” 9    πŸ’¬ 1    πŸ“Œ 0

Thanks @hollycullenfreo.bsky.social for this public service - international labour law at the ICJ!

07.10.2025 04:38 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I despair of UK asylum developments - from bad to worse in terms of wrongheaded performative cruelty

02.10.2025 06:06 β€” πŸ‘ 3    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

From 1939-1945 German officers also listened to speeches from civilians about how the laws of war didn’t apply to them. And then they participated in the Holocaust, starved millions of prisoners of war, destroyed villages and cities, and were defeated.

02.10.2025 00:47 β€” πŸ‘ 5348    πŸ” 2028    πŸ’¬ 246    πŸ“Œ 82

So excited for this event!

28.09.2025 14:53 β€” πŸ‘ 4    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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The programme is here! TriCON New Voices in Constitutional Law Workshop features 6 brilliant ECRs tackling diverse research inquiries, with expert feedback from leading constitutional law academics - plus a keynote session by Prof. Leah Trueblood. @tricondublin.bsky.social

23.09.2025 09:37 β€” πŸ‘ 3    πŸ” 2    πŸ’¬ 0    πŸ“Œ 1

"the European Commission presented today its proposal to the Council to suspend certain trade-related provisions of the Association Agreement between the EU and Israel ... as well as its proposals for sanctions on Hamas, extremist ministers and violent settlers"

ec.europa.eu/commission/p...

17.09.2025 15:22 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Cover image for a report entitled "From Surveillance to Empowerment: Advancing the Responsible Use of Technology in Alternatives to Detention" Accessible text via link

Cover image for a report entitled "From Surveillance to Empowerment: Advancing the Responsible Use of Technology in Alternatives to Detention" Accessible text via link

A busy week...

My @refugeelab.ca released our report about tech and alternatives to immigration detention, co-authored by @danghez.bsky.social & @petramolnar.com, and co-published with @kaldorcentre.bsky.social and @idcoalition.bsky.social:

www.unsw.edu.au/content/dam/...

16.09.2025 16:31 β€” πŸ‘ 18    πŸ” 12    πŸ’¬ 1    πŸ“Œ 0

A must read from Guy S Goodwin-Gill - his exortation at the end

'We must make it known that we do not want and will not share our space with war criminals or gΓ©nocidaires.'

& that we must talk & talk about genocide needs to be heard loud & clear among public international law scholars

04.09.2025 08:27 β€” πŸ‘ 8    πŸ” 5    πŸ’¬ 1    πŸ“Œ 0

From myself & @colinmurray.bsky.social on the European Convention on Human Rights & very briefly (bc it is clear) why it is not plausible to claim that it is possible to leave & not breach the 1998 Good Friday/Belfast Agreement.

16.09.2025 11:30 β€” πŸ‘ 13    πŸ” 3    πŸ’¬ 0    πŸ“Œ 0
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πŸ“’ Marking 75 years of the European Convention on Human Rights (#ECHR) and 35 years of the #VeniceCommission
ECHR and Venice Commission: Guarding Human Rights and the Rule of Law, and Facilitating Constitutional Resilience
πŸ“Œ BIICL, London | πŸ—“ 6–7 Nov 2025
πŸ“Œ Programme now available
buff.ly/hK00usl

13.09.2025 13:43 β€” πŸ‘ 1    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0

Now listened all the way through and repeat my recommendation. But not for squeamish, since has EHCR and Refugee Conv gone in 10 y, possible Farage PM, mass deportation in near future, and EU transformed into vehicle of pan-Euro exclusionary "Christian" nationalism. All avoidable if we fight back.

13.09.2025 14:01 β€” πŸ‘ 14    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
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Non-signatory States in International Refugee Law "Non-signatory States in International Refugee Law" published on 09 Sep 2025 by Brill | Nijhoff.

Our new edited volume, Non-signatory States in International Refugee Law, has just been published πŸ“Œ
The open access book explores the intricate relationship between the international refugee regime and states that are not signatories to the 1951 Convention and its 1967 Protocol.

Read the full book:

10.09.2025 13:18 β€” πŸ‘ 4    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0

Today the elected members to the judiciary in Mexico πŸ‡²πŸ‡½ take office and so a new era of sheer uncertainty re the independence & quality of judicial admin begins.

01.09.2025 14:20 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0
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The most radical part of Reform’s deportation plans β€˜Operation Restoring Justice’ would face legal, logistical and diplomatic hurdles.

New piece in The Conversation by Rob McNeil and Peter Walsh from @migobs.bsky.social

The most radical part of Reform’s deportation plans theconversation.com/the-most-rad...

29.08.2025 12:46 β€” πŸ‘ 3    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
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Amnesty International launches global campaign to protect UK protest rights after Palestine Action arrests The Urgent Action will involve letters addressed to the UK’s Chief Prosecutors, signed by activists and supporters all over the world.

For the 1st time the UK will be the the subject of an @amnesty.org global urgent action. It says this is to "protect the right to protest in the UK, following the arrest, since July 2025, of over 700 people for peacefully protesting in support of Palestine Action" www.amnesty.org.uk/press-releas...

23.08.2025 00:53 β€” πŸ‘ 17    πŸ” 18    πŸ’¬ 0    πŸ“Œ 0
https://www.justsecurity.org/105629/amnesty-international-gaza-genocide-report/

For my own take, see here:

8/8

t.co/MTYGJRxN2x

14.08.2025 00:32 β€” πŸ‘ 7    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
https://opiniojuris.org/2025/05/26/genocidal-intent-in-armed-conflict-unpacking-the-icjs-only-reasonable-inference-standard/

For more on this theme, see this excellent essay:

7/

t.co/FmsD1l3pky

14.08.2025 00:31 β€” πŸ‘ 6    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

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