Keziah Mastin

Senior Manager

Areas of expertise

Experience

Keziah specialises in environmental taxes. Her previous experience lies in tax disputes and she also has both contentious and policy advisory experience whilst at HMRC.

Article

Tax changes for overseas permanent establishments

A new announcement makes changes to the foreign branch exemption regime, with consequences for both corporation tax and R&D reliefs.

Insight Business tax International

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Article

Tax update May 2026

The latest tax update and VAT round up for the month.

Insight Business tax Tax

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