This may be because the revenue reported in the annual reports is for its discontinued operations. Reuters capture only the existing operations information in their database.
If however you think the company has reported continued operations revenue, please feel free to raise a support ticket.
An example where the company has not reported any revenue for its existing operations is United Carpets (UCG.L) in 2012 after administrators were appointed in October 2012. Please refer to note 8 of the annual report for details on the company's Significant accounting policies (extracted below).