Royal Mail announced price hikes today – just months after being sold by the Government on the cheap.
The newly privatised postal giant is jacking-up prices for business post by as much as 4.1% in April this year.
The increase will hit other postal operators that collect items from big customers, such as banks and energy companies, before sorting them and paying Royal Mail to deliver to homes.
The blow comes amid growing fears that the firm will raise stamp prices at the same time.
A first class stamp already costs 60p, having more than doubled since 2002.