19 AD. Earliest dated records of cannabis pollen in the United Kingdom. After this date cannabis is used legally by thousands (if not millions) of people.
In 1928: Cannabis became illegal in the United Kingdom as a class B drug.
In 2004: Cannabis was downgraded to a class C substance. Consequentially there was a "significant fall in its use" and a "50 per cent rise in the number of people" seeking "medical treatment after using the drug".
In 2008: The government commissioned a study into the effects of downgrading cannabis from a class B to a class C.
On May 7, 2008: Against the advice of the government's own commissioned report, the Home Secretary, Jacqui Smith, announced the government’s intention to once again reclassify cannabis as a class B drug. Then-prime minister Gordon Brown announced that the government would set aside the findings of the committee.
On 26 January 2009: Cannabis was reclassified as a Class B substance.
In November 2009: Professor David Nutt was asked to resign from his position as chairman of the Government's Advisory Council on the Misuse of Drugs by the then Home Secretary (Alan Johnson), after publishing in a professional journal figures which indicated that cannabis was less harmful than both alcohol and tobacco. Several other members of the Advisory Council resigned in protest.
Afterwards, discussions were being focused towards imposing a new 'code of conduct'; in order to avoid any similar action in future, rather than of the issue at hand (that being the legality of the plant cannabis itself) also this is not under Common law offences, the basis for Statutory law in the UK.
On 17 August 2010: Professor Sir Ian Gilmore criticised prohibition, revitalising the topic in hand.
On 14 September 2010: Professor Roger Pertwee suggests that "policymakers should consider the setting up of a committee to license the sale of recreational cannabis."
On 18 September 2010: "Tim Hollis, chairman of the Association of Chief Police Officers’ drugs committee" says that he "does not want to criminalise people caught with minor amounts of substances such as cannabis."
On 20 September 2010: "Ewan Hoyle, founder of Liberal Democrats for Drug Policy Reform, says [that his] party should support [the] legalisation [of cannabis]".
On 3 October 2010: Presenter Evan Davis compared “having a spliff” with potentially risky activities (like skiing), whilst interviewing Lord Young.
On 11 October 2010: Welsh actor and musician, Rhys Ifans "calls for cannabis decriminalisation" or legalisation within the United Kingdom.
On the same day: An editorial in the British Medical Journal, written by Professor Robin Room, suggested "that the sale of cannabis should be licensed like cigarettes because banning it had not worked".
On 1 November 2010: Professor David Nutt publishes a paper which classes alcohol as being more dangerous than cannabis or heroin under a new 'points system'.
On 7 November 2010: Lord Taverne asked at question time in the House of Lords: "If the Government believes in evidence-based policy, is it not obvious in light of this [David Nutt's] report and many other reports that make similar conclusions that the present classification of Ecstasy in class A and cannabis in class B is not in any way based on evidence of the physical or the social impact?
On 10 November 2010: Cartrain manages to smuggle in and light up a joint in the House of Commons, shouting "decriminalise cannabis" whilst being hauled out by the police.
On 16 December 2010: Bob Ainsworth, the former minister and Home Office Parliamentary Under-Secretary with responsibility for Drugs and Organised Crime explains why he thinks certian illict substances should be legalised.
On the same day: Peter Lilley, the former Tory deputy leader, said that he favoured legalising cannabis, while continuing the ban on hard drugs.
On 27 December 2010: Liam Smith labels Bob Ainsworth a "coward" for refusing to act when he had the power to do so. In defence Bob Ainsworth says: “If I had put forward the views that I was slowly developing as a minister then, I would have had to resign."