outlets, took attention away from the previous day's speech by Brown to Citizens UK, widely described as his best in the campaign. A Conservative Party activist in Peterborough was arrested after alleged postal voting fraud, calling into question 150 postal votes. Simon Bennett resigned as the head of the British National Party's online operation then redirected its website to his own on which he attacked the party's leadership. On the morning of polling day, 6 May, the former and later leader of UKIP, Nigel Farage, standing in Buckingham against the Speaker, was injured when a light banner-towing aircraft in which he was a passenger crashed near Brackley, Northamptonshire. Groups of voters waiting in queues at 10 pm were locked out of polling stations in Sheffield Hallam, Manchester and Leeds; and police said one London polling station was open until 10.30 pm, which triggered a national review of polling station requirements led by the Electoral Commission. The counts for the Foyle and East Londonderry constituencies were suspended because of a security alert around 11 pm after a car was abandoned outside the counting centre, causing a bomb scare. Debates Following a campaign by Sky News and with agreement of the party leaders, it was announced on 21 December 2009 that there would be three leaders' debates, each broadcast on prime time television, and a subsequent announcement in March 2010 that a debate between the financial spokesmen of the three main parties, Alistair Darling, George Osborne and Vince Cable would be held on 29 March. The SNP insisted that as the leading political party in Scotland in the latest opinion poll, it should be included in any debate broadcast in Scotland. On 22 December 2009, the UKIP leader, Lord Pearson stated that his party should also be included. Following a decision by the BBC Trust not to uphold a complaint from the SNP and Plaid Cymru over their exclusion from the planned BBC debate, the SNP announced on 25 April that they would proceed with legal action over the debate scheduled for 29 April. The party said it was not trying to stop the broadcast but it wanted an SNP politician included for balance. The SNP lost the case, in a judgement delivered on 28 April. Opinion polls Since each MP is elected separately by the first past the post voting system, it is impossible to precisely project a clear election outcome