Sioned Davies

Viewing: Planning and Environment for Sioned Davies

Sioned has gained a broad range of planning and infrastructure experience, including at hearings, inquiries, call-ins and in the High Court, both in a led and unled capacity. This has included acting for and advising a wide range of clients including developers, national and local government, the Welsh Ministers, and other interested parties.
Recent highlights have included:
- 2 day enforcement inquiry and 1 day hearing (sole counsel)
- 8 day inquiry for 473 houses in an Area of Outstanding Natural Beauty (led by Christopher Young QC)
- 9 day hearing for mixed use development for 216 homes, 1600 square metres of commercial space (led by Christopher Young QC)
- 8 day inquiry for 45 houses with complex heritage issues (led by Christopher Young QC)
- 4 day inquiry for industrial development in the Green Belt (led by Peter Goatley QC)
- 9 day inquiry for planning permission for residential use (led by Clive Newberry QC)
- sole counsel in the High Court permission hearing
- pupil barrister shadowing the High Court and Court of Appeal proceedings in some of the most important decisions of 2020 relating to NPPF interpretation (Gladman v SSCLG and Peel Investments v SSHCLG)
Sioned’s advisory practice encompasses the following areas:
- Section 106 agreements, negotiations, ransoms
- Housing land supply, land allocations and regeneration of previously developed land
- Green Belt Areas of Outstanding Natural Beauty and heritage assets
- Permitted Development and Use Classes Order
- Judicial and Statutory Review
- Injunctive relief
Sioned has gained broad experience of the infrastructure planning and consenting regimes in both England and Wales. Throughout her pupillage, she gained experience of challenges to major infrastructure projects, including offshore decommissioning projects in the North of England, to HS2, Drax Power Station, and the North London Heat and Power Project.
More recently, and in her own right, she has advised on:
- aspects of compulsory purchase and compensation for HS2
- as sole counsel on legal aspects of using Special Development Orders for border infrastructure works in light of the UK’s exit from the European Union
- a Transport and Works Act Order for a 35 square kilometres commercial testing offshore tidal power demonstration zone
Civil Orders and Injunctive relief
Sioned has a broad range of experience seeking injunctive relief in a variety of courts. This has included:
- seeking injunctive relief against direct action protestors on a major infrastructure project for trespass
- defending gypsy and travellers in injunctive relief for unauthorised development in the Green Belt
- seeking civil orders on behalf of the Metropolitan Police including for Domestic Violence Protection Orders, Sexual Risk Orders and Closure Orders, some of which included vulnerable defendants
Sioned has a keen interest in developing her environmental law practice. During pupillage, Sioned was exposed to leading challenges relating to climate change risk assessment and climate litigation. This included challenges to the UK Emissions Trading Scheme (R (on the application of Georgia Elliot-Smith v SSBEIS).
Areas on which she has been asked to provide advice include:
- climate change legislation
- marine licensing
- flooding
- habitats regulations assessments
- environmental impact assessments
Recent work has included:
- Advising on environmental assessments in respect of residential development; road projects and border infrastructure works
- Advising on the marine licensing and assessment aspects of an offshore tidal demonstration zone
- Working as part of a team of researchers to analyse international obligations on environmental impact assessment
Compulsory Purchase and Valuation
Sioned gained experience on a broad range of compulsory purchase and valuation matters during pupillage and has worked, in her own capacity, on a range of matters, including for HS2.
Sioned has gained a broad range of regulatory law experience and of private prosecutions.
Public and EU Law
Sioned has advised on a broad range of public law matters, judicial reviews including on matters which are devolved.
Other information
Prior to coming to the Bar, Sioned was the Chair of a national agricultural youth charity and worked as Head of the Secretariat to the Climate Law and Governance Initiative at COP24 in Katowice, Poland. This event brought together lawyers in the global climate discussion including from states, the World Bank, Green Climate Fund and leading law firms.
Welsh (fluent)
Government Legal Department Panel of Junior Junior Counsel
Welsh Government Junior Barrister Public Law Scheme
Kate Bertram Prize for academic distinction (University of Cambridge)
John Frederic Whitehouse Award for highest marked law dissertation (UCL)
Bentham Award for high academic achievement (UCL)
Young Compulsory Purchase Association
Administrative Law Bar Association
BPP Law School - Bar Professional Training Course – Very Competent (2019)
University of Cambridge – Environmental Law and Policy (MPhil) – First Class Honours (2018)
University College London (UCL) – Law (LLB) – First Class Honours (2017)

Latest News & Publications

In R v Canterbury City Council [2020] EWCA Civ 1588, the Court of Appeal considered two applications to re-open final appeals pursuant to CPR52.30....

Date: Mon, 07 Dec 2020
Sioned Davies joins No5's Planning and Environment Group...

Date: Tue, 03 Nov 2020