Police hope educating the public about the smell of cannabis will make it easier to clampdown on those growing the drug.
Hundreds of police officers have failed new fitness tests which are due to become mandatory later this year, official figures show.
In a damning report, the HMIC said police are failing victims of domestic violence right across England and Wales. Urgent reform is needed.
The future success of the police is dependent on attracting the best and brightest to careers in the force, the Policing Minister has said, as a move to fast-track officers into senior roles come into force.
Damian Green added: "This is the first time that chief constables will be able to recruit talented and motivated leaders from other walks of life, who can bring a wide range of experience and expertise.
"They will receive world class training from the College of Policing and will bring a fresh perspective and approach, opening up policing culture which will benefit their colleagues and the public."
Police forces should reflect the communities which they serve, the Prime Minister said, as a move to fast-track officers into senior roles come into force. David Cameron said:
Schemes like these will enable talented and experienced people from a range of backgrounds to bring new ideas and a fresh approach to policing.
We have already slashed red tape and cut bureaucratic targets, this is about opening up policing culture by making the workforce more diverse. I want to see all forces in England and Wales rolling out these schemes.
Nearly two centuries of policing tradition will be swept aside from Tuesday when moves to fast-track officers into senior roles come into force.
Previously the only way to enter the police, since Robert Peel founded the Metropolitan in 1829, had been to join as a constable.
The College of Policing has today launched two new recruitment programmes to bring people with more diverse backgrounds and new perspectives into policing - offering direct entry and fast-track into top positions.
It means the traditional route of entry-level officers spending time as a bobby on the beat will be replaced with a three-year fast-track to inspector scheme and direct entry at superintendent level, while the rank of chief constable will be opened up to overseas applicants.
A damning report into how police deal with domestic violence has found there are "alarming and unacceptable" failures.
Her Majesty's Inspectorate of Constabulary (HMIC) found only 8 of 43 forces in England and Wales were currently providing a substantial service.
Thousands of domestic violence victims are being failed due to poor attitudes, ineffective training and inadequate evidence gathering, HMIC said, as it called for an urgent shake-up of the response.
UK Editor Lucy Manning reports.
A domestic abuse victim has told ITV News that frontline police need more training.
Kimberley (not her real name) said that after being repeatedly abused by her partner she eventually went to police but felt their initial response was too "casual".
She claimed the officer who initially took her statement refused to take certain details and only took pictures of her severe injuries after she prompted him.
She added: "He was very casual. I think he did believe me but he didn't take it for the seriousness that it was."
Kimberley says her case was not handled properly at the outset, although the situation improved when it was passed to more senior officers.
She said more training was needed: "The first line of response has got to be stronger more sensitive, more training is required for these people."
Greater Manchester Chief Constable Sir Peter Fahy says he's disappointed by criticism of the way his force handles domestic violence cases. He points to the high number of arrests and the volume of recorded incidents.
He says they've been involved in a number of ground breaking initiatives to tackle the issue.
Just eight of 43 police forces responded well to domestic abuse and the most vulnerable victims faced a "lottery" in the way their complaints were handled, inspectors said.
The forces singled out by inspectors as being of particularly serious concern were:
- Greater Manchester
Lancashire Police was hailed as having the best response to domestic abuse.
Among the forces found to be of serious concern, Bedfordshire had one officer working in its domestic violence unit, and in a case in Greater Manchester, the 13-year-old daughter of a victim was asked to act as a language interpreter for officers investigating allegations against her father.
The British legal system is not "set up to deal with the complexities" of domestic violence, a senior police officer told Daybreak.
Assistant Chief Constable Louisa Rolfe said officers "worked tirelessly" to protect victims of domestic violence, but legislation had not evolved enough to allow them to properly police the situation.
"It is absolutely right that when we get it wrong that we are held to account and those cases where we get it wrong are well documented but there are many cases where officers work tirelessly to protect victims everyday.
"But it is a difficult challenge for us. Our traditional justice system is not set up to deal with the complexity of these challenges."
Police failures in the treatment of domestic violence victims are "just not good enough" but have been prevalent for decades, the head of a woman's charity told Daybreak.
Refuge chief executive Sandra Horley explained: "We are very pleased by the HMIC report but we are not surprised. It confirms what Refuge has been saying for decades.
"For decades we have been highlighting police failings, and these failings are absolutely shocking. Two women a week are killed by a current or former partner...and to use the words of HMIC the police response is just not good enough."