LONDON - Three more U.K. property funds have suspended trading, preventing investors from getting their money back and joining a trend that has prompted a rise in calls from savers to the financial services complaints body.

The funds pulled down the shutters after a wave of investors asked for their money back amid speculation about a drop in U.K. commercial property prices following the country's vote to leave the European Union on June 23.

Henderson Global Investors, part of Henderson Group , said on Wednesday it had temporarily suspended trading in its 3.9 billion pound (US$5 billion) U.K. Property PAIF and PAIF feeder funds due to "exceptional liquidity pressures" given  uncertainty after the "Brexit" vote and the other suspensions.

It was followed within the hour by Columbia Threadneedle, part of the Ameriprise Group, which said it had suspended trading in its Threadneedle U.K. Property Fund.

Canada Life said in a note to investors seen by Reuters that it had also suspended its Canlife Property and Canlife U.K. property funds.

The firm said it made the decision due to “ongoing uncertainty around the pricing of commercial property assets, following the vote to leave the EU, and the recent rise in requests to withdraw...from the property funds.”

They join rival funds managed by M&G Investments, Aviva Investors and Standard Life Investments,  which stopped trading on Monday and Tuesday.

In response to the rash of suspensions, Britain's Financial Ombudsman Service said it had begun to receive calls from concerned retail investors worried about the closures and the potential hit to their savings.

"It is certainly too early for formal complaints about this issue, however, we have begun to see initial enquiries come through from concerned consumers," a spokeswoman said.

"This is something that is very much on our radar. Although the decision to suspend redemptions was expected, the extent of the suspensions by the three funds so far is quite troubling."

Property funds can find it particularly difficult to cope with a rush of redemptions as it can take time to sell their assets in order to give investors their money back.