Big4 Quality
IESL provides the quality expected from a "Big4" practice with the added benefit of local market rates.
Best Practice

“Systems and Processes should be reviewed on a regular basis to ensure that they are up to date, tax efficient and tax compliant and not when an Inland Revenue Audit is on the horizon”.

Geof Heron a founder director who heads up the Cardiff office. Geof has over 20 years experience working for the Inland Revenue before moving to a Big4 firm at their Cardiff offices.

Adrian Williams a founder director who heads up the Swindon office. Before moving to a Big4 firm in 1998, Adrian had nearly 10 years working with the Inland Revenue.

Ian Gronow joined IESL directly from the Inland Revenue in the summer of 2006, bringing with him 30 years of tax investigation experience.

Steve Gretton joined IESL in October 2006 directly from the Inland Revenue. At the Inland Revenue, Steve was the regional Employment Status inspector for Bristol and the South West.



The Cardiff office services South Wales, Gloucestershire, the Midlands and South West.  






The Swindon office services the M4 corridor, London, the Thames Valley and the South of England.

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