A fourth man, aged 19, was arrested later after voluntarily going to a police station. The four have all been released on bail to return to south London police stations in early March.Mr Robinson, 25, was stabbed through the heart in front of his girlfriend, Jemma Joyce, 26, outside their home in Battersea, south-west London, on 27 January. After the attack the killers fled on foot leaving the vehicle behind.The police are investigating several leads, including reports that Mr Robinson was among several people who had complained about noise caused by a pirate radio station operating close to his home.Residents had repeatedly protested about aggressive youths and loud noise. The illegal radio station is believed to have closed down shortly after the attack and the police want to question the organisers of the station.A Scotland Yard spokesman said: “Officers investigating the murder are aware of the existence of a pirate radio station, which is near the scene of the crime However there’s no evidence to connect this to the murder.

It’s just one of a number of lines of inquiry.”Mr Robinson had picked up Ms Joyce, a trainee teacher, from London’s West End before the attack at 10pm. As she directed him into a tight parking space outside their home two men asked her for directions. Mr Robinson finished parking the car and got out to ask the men where they wanted to go and within moments he had been stabbed half a dozen times in the face, chest and upper arm. He was taken to St Thomas’s Hospital, where he died three days later.Detectives are still appealing for a white boy – aged about 13 or 14 – who a witness mentioned as having been nearby at the time of the incident, to come forward. He was on a mountain bike and may have been wearing a red jacket.. Tony Blair is forging a close alliance with Italy’s controversial premier and media magnate, Silvio Berlusconi, and plans to seal the Anglo-Italian axis with an agreement on economic policy next week. But Friday week’s Anglo-Italian summit in Rome is already being presented by some Italian newspapers as an end to Italy’s recent period of isolation.The joint declaration, which is still being drafted, will promote a new UK-Italy trade agreement and call for labour market reform within the EU.

But it is also expected to demand that European countries agree, by the end of the year, to set a date in the near future for the liberalisation of commercial energy supplies in the EU. It is also likely to call for a calendar for the freeing of the domestic energy market.Downing Street said yesterday it was “working with Italy on a range of issues including economic reform” and added that it is “committed to working with all EU partners in terms of this agenda”.The move comes ahead of a summit on economic reform in Barcelona next month at which little progress is expected on this highly sensitive topic. France, which faces elections within weeks, is blocking an early deal and is likely to receive support from Germany. With elections also looming in September, Gerhard Schr?, the German Chancellor, is adopting an increasingly hostile and populist stance toward initiatives, recently criticising a move by the European Commission to free the car sales market.Some observers fear that the EU will be reduced almost to paralysis, with no progress on important subjects such as enlargement, during the next six months.With support for economic reform waning in France and Germany, Mr Blair is trying to build an axis with the centre-right governments in Italy and Spain. He already has a strong rapport with Jose Maria Aznar, the Prime Minister of Spain, who is a firm supporter of economic reform.The Government hopes that the Barcelona summit can still produce a positive statement on energy liberalisation. One Foreign Office official argued yesterday: “We are not downbeat but realistic.”Mr Blair also sees common ground with Mr Berlusconi over the future of Europe.

The Italian premier has stressed the importance of “parliaments and governments” and argues that “the general principle of subsidiarity must always reign supreme”. Italian diplomats talk of wanting a “more British approach” to EU policy.Relations between Britain, Italy and Spain have blossomed since the Gothenburg EU summit last June. At the time Alejandro Agag, a senior Spanish MEP and ally of Mr Aznar, told journalists that the “BAB” axis – Berlusconi-Aznar-Blair – would be influential in shaping Europe’s future.. Omar Saeed Sheikh, the docile, chess-loving English public schoolboy who turned Islamic holy warrior while reading Maths at the LSE, masterminded the kidnapping of the American journalist Daniel Pearl , US and Pakistani investigators said yesterday. “We know he has no place to go.” A US State Department official confirmed that Mr Sheikh is now the chief suspect.Last week The Independent, first suggested that Mr Sheikh was probably behind the kidnapping of the Wall Street Journal reporter after comparing the unusually high standard of English in the emails sent by the kidnappers with Mr Sheikh’s diaries which were published in the Indian press after a kidnapping incident in Delhi eight years ago. Mr Sheikh’s methodology – befriending the victims and suggesting they meet at another location was also similar to Mr Pearl’s kidnapping.Three men suspected of sending e-mails that contained photographs of Mr Pearl, have now been arrested and their computer has been seized.