The LSE said the exchanges were highly complementary

The vote, at a special shareholder meeting, followed approval of the deal by Borsa Italiana investors last week.

The deal should be completed in October if, as expected, it is approved by European regulators.

The two firms say the deal will create the largest trading market in company shares in Europe.

'Value'

The London Stock Exchange (LSE) said Wednesday's vote was a "significant endorsement" of the merits of the deal.

"Borsa Italiana and the Exchange are highly complementary and the merger will create considerable value for both our customers and our shareholders," said Clara Furse, LSE's chief executive.