Dispatches: Post Office Undercover C4, 8pm

IN 2004 and again in 2005, Dispatches went undercover to investigate Royal Mail.

These reports exposed serious systemic and individual failures within the organisation.

That resulted in an inquiry by the postal regulator Postcomm, and was followed by a fine of almost £10 million.

Five years on, Royal Mail claims it is modernising and improving its service.

So two reporters are sent undercover as agency postmen to find out if Royal Mail has delivered on its promises.