Treatt plc provided revenue guidance for the half year ended 31 March 2020. The company previously reported, it is expected the sharp fall in citrus raw material prices in the last financial year to continue to impact upon revenue in the first half of the current financial year. Consequently, whilst in-line with expectations, revenue for the period is expected to be approximately 5.1% lower as compared with the same period in the prior year (5.6% lower in constant currency).