European equities closed in positive territory on Wednesday, as investors prepared for the following day when the U.K. votes in its referendum on the European Union.
The pan-European STOXX 600 ended trade up 0.4 percent, despite coming under pressure earlier on in the session.
At the close, the leave campaign had established a one-point lead (45 percent) over the remain camp (44 percent), according to Opinium's latest poll. Following the poll, when markets were settling after the close, sterling fell sharply against the dollar, while bourses also pared sharp gains. At the close, the STOXX 600 closed provisionally up 0.9 percent, before settling at 0.4 percent.