The polls suggest tomorrow's vote could be very close, with the two sides staying neck and neck.
Immigration has been one of the main issues of the campaign.
Commemorations marking what would have been Labour MP Jo Cox's 42nd birthday are due to be held today.
The mother-of-two was stabbed and shot in her West Yorkshire constituency nearly a week ago.
A special event is being held at Dublin's ha'penny bridge later. (4pm)
Meanwhile a dinghy laden with flowers will be towed along the Thames – where she lived on a houseboat – to the Houses of Parliament.
