In London there had been no repeat of the wave of violence which left parts of the capital in flames London - Marijana Wotton   London was mostly quiet after a huge boost in police numbers on Tuesday evening which saw 16,000 officers on the streets, compared to the 6,000 out on Monday night. Commuters hurried home early, shops shut and many shopkeepers boarded their windows as the city prepared nervously for more of the violence that had erupted in its neighborhoods.
Police arrested 81 people overnight, across London, for various offences, filling the city's cells to capacity four nights since the trouble started.
Also, many Londoners took to the streets in their hundreds to defend their communities.
Hundreds of Sikhs, many dressed in traditional outfits, gathered outside their Murdwara, or Temple, in Southall, West London, after earlier rumors circulated it was next on the looters hit list.
Around 200 locals in Enfield, the north London borough at the heart of previous attacks, strode through the area to "protect their streets", an AFP correspondent said.
The group became involved in a "minor skirmish" with a group of youths which it accused of taking part in criminal activity, the Guardian newspaper reported.
Amateur video footage released on Wednesday showed a group of around 100 men running down an Enfield street chanting "England, England, England".
A similar number of people congregated in the south-east suburb of Eltham, also rumored to be a likely hot spot.
The PM is recalling Parliament over Monday night's "sickening scenes".
Some 108 people have been arrested so far over trouble in Manchester and Salford where crowds of youths have set fire to buildings and cars while 87 have been arrested over disorder which has broken out across the West Midlands.
In other developments:
West Midlands Police have started a murder inquiry after three pedestrians were killed in a road accident. It is not known if the incident is linked to overnight rioting but it is thought the men were protecting their neighborhood at the time.
Greater Manchester Police Assistant Chief Constable Garry Shewan said his force had faced "extraordinary levels of violence from groups of criminals intent on committing widespread disorder" on Tuesday. Many police cordons that were around the area were lifted just before 02:00 BST.
Some 23 people have been charged in the West Midlands with a total of 229 arrests following sporadic disorder in Wolverhampton, while youths have smashed shop windows and set cars alight in nearby West Bromwich.
In Birmingham, riot police surrounded the Mailbox, the city's high-end shopping centre, following the disturbances seen in the area on Monday night.
Canning Circus police station in central Nottingham was firebombed by a male gang on Tuesday evening
In Liverpool, Merseyside Police have arrested 50 people in relation to disorder in the city.
Three people have been arrested in Gloucester after police officers came under attack from youths throwing rocks and bottles from 23:00 BST
In Leicester, a group of up to 100 youths attacked shops and threw items at police.
Metropolitan Police have arrested 768 people and charged 105 in connection with the violence in the capital, including a 21-year-old man who was arrested on suspicion of arson with intent to endanger life following a fire which took hold of the Reeves Furniture store in Croydon on Monday night.
A 26-year-old man found shot in a car in Croydon, amid rioting in the south London town, has died in hospital
Government minister Michael Gove has praised Met's response to the riots, saying bringing in an extra 10,000 officers helped to prevent further riots from taking place in London.
Meanwhile, two 18-year-olds were arrested in Folkestone, Kent, and a 16-year-old boy in Glasgow was charged with breach of the peace while another man, aged 18, has been arrested. All relate to allegations of inciting violence through internet social networking sites.
The Independent Police Complaints Commission (IPCC) said on Tuesday that ballistic tests presented "no evidence" that a handgun found at the scene where Mr Duggan was killed had been fired at officers.
The Association of British Insurers says the damage is likely to cost insurers "tens of millions of pounds".
Monday's violence started in Hackney, north London, at about 16:20 BST after a man was stopped and searched by police, who found nothing.
Groups of people began attacking officers, wrecking cars with wooden poles and metal bars, and looting shops. Violence then flared separately in other parts of the capital.
'No justification' Mayor of London Boris Johnson, who also cut short a holiday to return, was heckled by the members of the public while viewing damage in Clapham Junction on Tuesday.
Some people have complained there have been too few police to deal with the violence.
Mr Johnson told those gathered that those responsible for the violence "face punishment they will bitterly, bitterly regret".
However, when challenged to do more for communities, Mr Johnson rejected "economic or social justifications" for the violence.
The London 2012 Organizing Committee hosted an International Olympic Committee visit "as planned" on Tuesday and said the violence would not hurt preparations for the Olympics.
However, other sporting events suffered. England cancelled Wednesday's international soccer friendly with the Netherlands and three club games were also called off.