The probable attacks have been named 'Operation Payback' and is heralded by close to 2000 dedicated hackers. This is soon after they sabotaged the websites of MasterCard, Visa and PayPal.
The hackers who call themselves 'Anonymous' intends to hack the British govt site and according to Gregg Housh, an American Internet activist and ex-WikiLeaks employee said: "They will go after the weakest links, because they want to see results. They will probably test a few sites and then decide."
Anonymous also plans to hack Amazon, the online retailer's website. They have already succeeded in hacking high-profile websites of U.S. Senator Joseph Lieberman and former Alaska Governor and vice presidential candidate Sarah Palin.
A 16 year old boy was arrested in Hague on Dec 10 and has confessed over allegations that he took part in the cyber attacks. Officials have been hounding people who are connected to WikiLeaks and are taking precautionary measures to curb the damage caused by the whistleblower site.
Julian Assange is expected to appeal for bail before the City of Westminster magistrate's court on Tuesday.