HHCL is behind notorious campaigns for the Unilever brand, including the "slag of all snacks" and, more recently, the "Pot Noodle horn".
It is likely to face up to two or three advertising agencies on the Unilever roster, possibly Bartle Bogle Hegarty, Mother or Lowe London.
The advertising review comes following Unilever's decision to relaunch Pot Noodle for a more upmarket, health-conscious audience, and the need for a new strategy to push the product.
The changes include reformulating Pot Noodle to get rid of all artificial colours and flavourings. The packaging will also be redeveloped.
Pot Noodle suffered during the Sudan 1 food dye scare earlier this year, where stocks had to be recalled. Sales fell by 13% after the crisis.
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