Researchers at King's College London tested almost 1,000 police seizures from Kent, Derbyshire, Merseyside, Sussex and the capital in 2016 and found 94 per cent were of a dangerously high potency.
Comment: Vodka is 'high potency' but we don't label it as 'dangerously' so. Considering cannabis is still criminalised it makes sense for it to be high potency, and smokers would, as you would do with vodka, use less.
In 2005 just 51 per cent of cannabis sold on the street was sinsemilla, also known as skunk.
Dr Marta Di Forti, Medical Research Council Clinician Scientist at King's College warned that the powerful drug placed Britain's 2.1 million cannabis users at risk of schizophrenia, bipolar disorder, depression, psychosis, delusions and hallucinations.
Comment: Those already susceptible, could be triggered by anything from a traumatic event to alcohol to cannabis. But do we also aim to shield the population from pints of beer and childhood trauma? Schizophrenia a side effect of human development?
'The increase of high-potency cannabis on the streets poses a significant hazard to users' mental health, and reduces their ability to choose more benign types,' she said.
Comment: Which is where the governments failed 'war on drugs' is to blame. Not only are they depriving an extremely effective medicine from patients, causing them untold suffering, but they are also leading to bumper profits to nefarious organisations and tarnishing those caught, doing no harm, with criminal records.
"It is of concern that 94 per cent of seized cannabis is now of skunk type as this potentially could increase the number of people using it and consequently the number of people experiencing harm.
"Regular users of high-potency cannabis carry the highest risk for psychotic disorders, compared to those who have never used cannabis."
Comment: Alcohol causes multiple times more harm and it's implicated in more cases of people suffering from psychiatric disorders.
The researchers also found that in normal cannabis resin, the average concentration of tetrahydrocannabinol (THC) - the main psychoactive component - had risen by 50 per cent since 2005, from four per cent to six per cent.
In contrast, the ratio of antipsychotic cannabidiol (CBD), which helps mitigate the drug's psychoactive effects, had fallen dramatically.
Skunk has around 14 per cent THC and is more dangerous because it contains very small amount of CBD.
Comment: CBD is also considered to be one of the most healing components - and isn't as effective when smoked. But in order to create a high CBD oil, which is prescribed as a medicine in countries from the US to Amsterdam, you need a particular strain and a large amount of cannabis; an impossibility in the UK where possession is a criminal offence.
In 2015 Kings College showed that in South London, 24 per cent of new cases of psychosis could be attributed to skunk use. Researchers now fear that the countrywide problem could be partly responsible for the growing number of mental health issues in Britain.
Latest figures shows there were 7,545 hospital admissions in 2016/2017 for drug-related mental health and behavioural disorders, 12 per cent higher than in 2006/2007.
Comment: There's also been a surge in all types of crime but even the police force, who are desperately underfunded, can not pinpoint the true cause.
There were also 14,053 admissions for poisoning by illegal drugs last year, a 40 per cent increase compared to a decade earlier.
Comment: They're seeing similar statistics in the US but this has nothing to do with cannabis, of which there has never been a documented case of death by overdose.
Ian Hamilton, Lecturer in Mental Health, University of York, said: "If these seized samples are representative then it suggests that apart from the dominance of skunk in the UK market, it also seems that resin has increased in strength, as this analysis shows that some resin samples were nearly three times stronger than those seized back in 2005.
"So even if people are trying to source lower potency cannabis they are unable to.
"If the cannabis market is saturated with higher potency cannabis this increases the risk of younger and more naive users developing problems as they are less likely to adjust the amount of cannabis they ingest than more experienced users."
Comment: Why are they less likely to adjust the amount? What evidence do they have for this statement? It's actually contrary to expected human behaviour.
Prof Valerie Curran, Professor of Psychopharmacology, UCL, said: "These findings have implications for the rising numbers of young people who are becoming addicted to cannabis.
Comment: Cannabis has never been shown to be addictive, at least pharmacologically - but then again, Bingo can be addictive:
"Evidence from our own previous research at UCL suggests that high potency varieties are more likely to lead to addiction, so if the market is dominated by these varieties then this inevitably puts more people at risk of addiction."
The research was published in the journal Drug Testing and Analysis.
Comment: The UK government are only interested in unscientific claims that confirm their bias. This is clear when we see that the last time they had a government drugs advisor, Professor David Nutt, who demonstrated science had proven contrary to their stance, they sacked him. Many countries are decriminalising cannabis, some are legalizing the production and distribution, and we're seeing it utilised, once again, as was known at least a century ago, but probably much longer, as a medicine, as well as for recreational use. In the UK whilst the public are labelled criminals, big pharma is hurrying itself to isolate the apparent singular healing compounds to be sold as medications. The inherent problem being that medicinal herbs generally require the whole plant, or at least parts of it like the leaves, root or buds, and their synergistic compounds to work effectively, so what you would be getting would be a poor substitute. But then big pharma can't patent, and therefore profit, from nature so they have to find a workaround.
The point is that this plant is relatively harmless but has been used as a tool for decades by governments, particularly the US and then its allies, and their nefarious players, to persecute and control people, with the reason for its criminalisation in the first place being highly dubious.
But as citizens around the world begin to realise they've been lied to and propagandised for decades - about all drugs - with science and life experience to back them up, and as the world turns away from the corrupt western nations, a new perspective is emerging; and with it a revolt against the draconian policies that cause more harm and suffering than the supposed substance they claim to be protecting people from.
Cannabis' possible healing qualities: