Jane Longhurst's killer was addicted to violent internet porn sites

Musician Graham Coutts, 35, was jailed for life in January for strangling the 31-year-old after visiting such sites.

He admitted to having a seven-year addiction to online violent pornography.

After the trial, Miss Longhurst's mother, Liz, said political pressure was needed to close down the websites.

'Appalling sites'

She said she believed Coutts' addiction was a factor in her daughter's death.

"It is definitely the case if Graham Coutts had not had the internet...I expect my daughter would be alive today," she said.

Speaking at the House of Commons after the meeting on Thursday, Miss Longhurst's sister, Sue, said the meeting had been successful.

The 40-year-old from Caversham, Reading, said: "It is only 10 days away from March 14, when my sister was murdered last year, and to consider that we have convicted Graham Coutts and then achieved such an amazing amount of interest in the campaign has been tremendous.

"I feel very confident we will eventually get something done."

Family's demands

Reading MP Martin Salter, who is backing the family, said the home secretary was flying to the US next week to meet John Ashcroft, the Attorney General.

He said: "He made it quite clear to us he wants to persuade John Ashcroft that it is in his interest - not just moral duty, but his political interest - for the American government to take a much tougher approach."

The family wants governments and internet companies to block access to sites, make it a criminal offence to possess extreme images, ensure better international cooperation, regulate internet images through Ofcom and act against credit card companies who deal with providers.

A spokeswoman for the Home Office said: "We are keen to do all we can to block access to these appalling and illegal sites and welcome views from interested parties and the internet industry."