By Simon Jessop and Siddharth Cavale

LONDON (Reuters) -A group of investors in Unilever said on Thursday they had filed a fresh resolution urging the company to fix a "crucial blind spot" in its strategy and set ambitious targets to sell healthier foods.

The resolution by an 11-strong investor group with $215 billion in assets, including Candriam, Actiam and Greater Manchester Pension Fund, calls on Unilever to disclose the current proportion of sales linked to healthier products.

It also urges the company to set a target to "significantly increase" that share by 2030, and publish an annual review of their progress.

While Unilever, owner of the Ben & Jerry's ice cream, Hellmann's mayonnaise and Pot Noodle brands, is seen as a leader in sustainable business by many funds, the investors said increasing regulations around health meant a failure to act could hit its finances.

Governments in many of the company's main markets have introduced taxes on products high in sugar or calories as obesity levels rise.

“Unilever has long been a sustainability leader. Some even criticise it for being too focused on ESG. Yet the health profile of the food and drink products it sells remains a blind spot," said Ignacio Vazquez, a senior manager at responsible investment NGO ShareAction, which co-ordinated the resolution.

British fund manager, Terry Smith, whose Fundsmith vehicle is a top-10 Unilever investor, lambasted Unilever last week for being "obsessed" with promoting its sustainability credentials at the expense of performance.

"By voicing their support for this resolution, Unilever's investors can help to drive change at the heart of one of the biggest foods and drink manufacturers in the world while also shielding themselves from regulatory and reputational risks,” Vazquez said.

In response, Unilever said it shared ShareAction's belief in the importance of having a long-term strategy for nutrition and health, and publishing targets, and had made a commitment to reduce sugar, salt and calories in its products.

The company said it plans to update its model for assessing nutrition in 2022, "making it more stretching and ensuring it better reflects our current portfolio and the role our products play in the diets of our consumers".

The resolution follows similar calls for action at last year's AGM, which ShareAction said had not resulted in much progress.

While Unilever said that in 2020, 61% of its food and drink sales were of products with "high nutritional standards", the investors said they questioned its metrics.