Pump Court Tax Chambers handles tax matters covering both onshore and offshore advisory and litigation work. William Massey KC continues to stand out in issues related to the taxation of trusts, land and landed estates. David Yates KC led Calypso Blaj on behalf of HMRC in Beard v HMRC concerning the tax treatment of distributions from a Jersey company.
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Mentions
Profile
Position
Calypso joined Chambers as a full tenant on 7th October 2020 after completing her twelve-month pupillage. She accepts instructions in all areas of Chambers’ practice including personal tax, corporate tax, VAT, stamp taxes, customs duties and international tax. Calypso is qualified to accept instructions under the Public Access Scheme.
Career
2019-2020 – Pupillage, Pump Court Tax Chambers
2017-2018 – Judicial Assistant, Court of Appeal
2017 – Called to the Bar (Lincoln’s Inn)
Languages
French (fluent)
Education
2016-2017 – BPP Law School – BPTC (Very Competent)
2015-2016 – City University – GDL (Distinction)
2011-2015 – Keble College, University of Oxford – French BA
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Testimonials
Collated independently by Legal 500 research team.
- 'Clerks areexcellent, scoping the brief and providing accurate timescales.'
- 'Friendly, approachable clerks' rooms. Enjoy working with Bruno Antoniotti and John Posyer. Both are a pleasure to work with.'
- 'Great clerking team.'
- 'High quality throughout and well clerked.'
- 'The top chambers for all things tax.'
- 'Exceptionally strong across the whole bench.'
- 'My go-to tax set for the breadth of knowledge and expertise.'
- 'Chambers can advise on all aspects of tax, they are consummate professionals and are run by a knowledgeable and helpful team of clerks.'

