A new report estimates a stunning 1.4 million Brits have resorted to sourcing illegal cannabis to treat diagnosed medical conditions.

On Monday, the Centre for Medicinal Cannabis (CMC) published data from a YouGov survey estimating an alarming 653,456 people use cannabis for depression, 586,188 for anxiety, and 326,728 for chronic pain.

Now, they’re calling on the UK government to review new policy on medical cannabis access with a report titled Left Behind – The Scale of Illegal Cannabis Use for Medicinal Intent.

The YouGov survey, which was based on a pool of 10,602 adults, also showed that Brits of all age groups, genders and economic backgrounds are using cannabis to self-medicate a variety of issues.

“These findings quantify what we long suspected, almost 3% of the UK adult population are choosing to use cannabis rather than traditional pharmaceutical products to treat their chronic medical conditions,” said Steve Moore, founder of the Centre for Medicinal Cannabis.

“We urgently need to know why and can only do so by extending access to cannabis-based medicine and accelerating clinical learning regarding its efficacy.”

The report comes amid mounting criticism of the UK government for tight restrictions around medical cannabis access over the last year. While Prime Minister Boris Johnson has hired a number of pro-cannabis legalisation figures to his cabinet, no changes have yet been made to expand access to medical cannabis on the NHS.