
‘A premier international arbitration boutique’, Three Crowns LLP acts for domestic and international clients in cross-border disputes across the energy, construction and financial services sectors, with additional expertise in handling investment treaty cases. Praised as ’highly reliable for complex and high-value disputes’, Daryl Chew jointly leads the team alongside Simon Elliot, who represents clients in commercial and treaty proceedings. Penny Martin is another key contact in the group.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
‘Penny Martin stands out for her practical and strategic advice that cuts straight to the issue.’
‘A unique boutique with all the talents in arbitration in one place. Ultra responsive, commercially minded and very good at listening to clients and managing expectations.’
‘Penny Martin is very responsive, efficient and thorough.’
‘An experienced team specialising in international arbitration.’
‘An excellent arbitration practice.’
‘Penny Martin is very responsive and provides excellent advice.’
Key clients
- PETRONAS
- Elliot Associates
- Trafigura
- TotalEnergies
- Sacyr
- Guardian Holdings
- BP
- Eni
- ExxonMobil
- Shell
- China National Petroleum Corporation
- Inpex
Work highlights
Representing Sacyr in a treaty claim against the Republic of Panama under the Spain-Panama BIT.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.

Practice head
Daryl Chew; Simon Elliot
Other key lawyers
Penny Martin