LONDON – A cross-party of MPs has joined together to pressure the government and Prime Minister David Cameron to support a sugared soda tax, according to The Guardian. The report from both Labor and Tory members of Parliament advocates a 20% tax on sugary beverages.

Cameron has been against such a tax but the Health Select Committee continues its push for the government to levy the tax. Committee chair MP Dr. Sarah Wollaston wrote in an op-ed that the committee does “not believe that this is an attack on low income families as industry lobbyists will no doubt claim, but rather an essential part of trying to reverse the harm caused by these products.”

The U.K. government will publish its child obesity plan in 2016, which the committee hopes will include a soda tax. Celebrity chef Jamie Oliver launched a petition in support of the tax, which has been signed by more than 150,000 people.

Meanwhile, more than a dozen campaign and health groups have formed The Obesity Stakeholder Group to lobby against what it deems as unhealthy foods, and the list includes a tax on soft drinks.

However, the health committee report does acknowledge that a 20% tax on sugared soft drinks, lemonade and other sugar-sweetened beverages would not lower childhood obesity alone, but would instead reduce consumption of such drinks in the short term.

“A sugary drinks tax is an essential part of a wider package of measures to tackle childhood obesity,” the committee’s report read. Revenue from the tax would fund children’s health initiatives.