Mr Riseley said postal operators were experiencing significant changes in the market including a drop in bulk mail due to the loss of Low Value Consignment Relief (LVCR).
Earlier this year, the BBC reported that Jersey-based Play.com was shutting down its online retail business after the government closed the Low Value Consignment Relief (LVCR) loophole.
"The removal of this major market distortion should be welcomed by all UK businesses that wish to trade online, " said Richard Allen, spokesperson for Retailers Against VAT Avoidance, a group that has campaigned against LVCR.