Prime Minister David Cameron told MPs the Government will not stand for extremists or "groups like the English Defence League who try to demonise Islam and try and stoke up anti-Muslim hatred".
Mr Cameron said in a statement to the House of Commons, "It is as if for some young people there is a conveyor belt to radicalisation that has poisoned their minds".
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The 20-year-old died after being chased by police and apprehended in a shop in Hackney, east London.
A bright start but cloud will soon bubble up to bring sunny spells and showers for many, possibly heavy at times.
It follows reports the US president is considering presidential pardons for his family, aides and even himself.