'Honour' attack numbers revealed by UK police forces
UK police recorded at least 2,823 so-called honour attacks last year, figures from 39 out of 52 forces show.
A freedom of information request by the Iranian and Kurdish Women's Rights Organisation (Ikwro) revealed that nearly 500 of these were in London.
Among the 12 forces also able to provide figures from 2009, there was an overall 47% rise in such incidents.
Honour attacks are punishments on people, usually women, for acts deemed to have brought shame on their family.'Mutilations'
They include acid attacks, abduction, mutilations, beatings and in some cases, murder.
Ikwro said its research, carried out between July and November, is the best national estimate so far of the extent of honour violence in Britain, although the charity says the figures do not give the full picture.
They found that eight police forces had recorded more than 100 honour-based attacks each in 2010.
The Metropolitan Police had the most at 495, followed by West Midlands (378), West Yorkshire (350), Lancashire (227), Greater Manchester (189), Cleveland (153), Suffolk (118) and Bedfordshire (117).
Of the 12 police forces able to provide 2009 comparison figures, nine recorded a rise in attacks and three saw totals fall.
The biggest rise was in Northumbria, which saw figures leap by 305% from 17 in 2009 to 69 in 2010, followed by a 154% jump in Cambridgeshire from 11 to 28.
A quarter of police forces in the UK were unable or unwilling to provide data and communities have often been reluctant to talk about the crime, Ikwro said.
Its director Diana Nammi said families often tried to deny the existence of honour attacks and those who carried them out were "very much respected".
She told the BBC: "The perpetrators will be even considered as a hero within the community because he is the one defending the family and community's honour and reputation."
She added that there was not enough support for victims, and many needed continuing help and protection.
"For some cases, police and some organisations just help them up to a length of time, then they will stop," she said.
"With honour-based violence, the threat may be a lifetime threat for them."'Significant number'
Ikwro's report said: "This is the first time that a national estimate has been provided in relation to reporting of honour-based violence.
"The number of incidents is significant, particularly when we consider the high levels of abuse that victims suffer before they seek help."
The Association of Chief Police Officers (Acpo) published a strategy in 2008 aimed at gauging the scale of the problem and recommending that all English and Welsh forces start recording the number of honour incidents.
Of the UK's 52 forces, 45 have now done that, although there is no national guidance in Scotland.The 52 comprise 39 in England, four in Wales, eight in Scotland, and the Police Service of Northern Ireland.