According to Grant Thornton, the Revenue is using the internet to gather information on company's activities, the Coventry Evening Telegraph reported.

Paul Malin, regional head of tax investigations at Grant Thornton, said: 'It is clear that the Revenue sees the internet as a valuable addition to the arsenal of evidence it can gather on a company.

'This information is freely available and, if there are sufficient inconsistencies to details already on file financial or otherwise, this could trigger an in-depth inquiry.'

The firm has warned directors to be 'extremely careful' about the material they include on their websites.