Restoration expert broke planning laws with work to his Cotswolds farmhouse

John Evetts convicted after admitting to carrying out unauthorised work at Grade II listed property

For more than 40 years he has helped return some of Britain's most extraordinary buildings to their former glory and is celebrated for his sensitivity and attention to detail.

But a key adviser to the restoration charity the Landmark Trust has been convicted of breaching planning laws by carrying out unauthorised work on his own property, an 18th-century farmhouse in the Cotswolds.