The latest polling indicates Britain's decisio on EU membership is too close to call as campaigning resumed for the first time since the murder of MP Jo Cox.
With just four days left until the country heads to the ballot box, several polls put the two sides neck and neck while Remain clawed back some of the gains made by Leave over the last week, in polls conducted before Thursday's tragic event.
An Opinium poll for the Observer pegs support for both sides neck and neck at 44 per cent, with the survey carried out between Tuesday and Friday.
Remain regained a marginal lead with 44 per cent versus Leave's 43 per cent, according to a YouGov poll for the Sunday Times. The polling firm said it did not believe the change is connected to Cox's death with a third of responses coming beforehand citing growing concern over the economics of Brexit among voters.
A Survation poll for the Mail on Sunday identified Remain taking a three point lead on 45 per cent, with field work carried out on Friday and Saturday, reversing the result of data released on Thursday by the same firm which put Leave ahead on 45 per cent versus Remain's 42 per cent.
Campaigning resumed on Sunday after a two day halt to activities after the shocking events, with key campaigners on both sides making their cases to the public.
Prime Minister David Cameron warned there would be "no-going back" if Britain votes to leave the union on Thursday and that Brext is a "one-way ticket", speaking to the Sunday Times, while arguing that leaving the EU was the wrong way to deal with immigration, writing in the Sunday Express.
Meanwhile, justice secretary Michael Gove told the Sunday Telegraph that voting Leave was a "vote for democracy".
George Osborne made his economic arguments for remaining in Europe which he had planned to make in his cancelled Mansion House speech while Boris Johnson urged voters to "do this thing" and that Thursday's vote was a "once in a lifetime opportunity".