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 Update February 2026

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

Insight Business tax Tax

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Article

What now for Trump’s tariffs after the Supreme Court ruling?

The court’s IEEPA tariff ruling and the President’s new Section 122 tariffs have implications for UK traders.

Insight International Business tax

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