NatWest (NWG) has joined the ranks of U.K. banks imposing restrictions on its customers making payments to cryptocurrency exchanges.

Customers will be limited to payments of 1,000 pounds ($1,218) per day and 5,000 pounds ($6,090) over a 30-day period, NatWest announced via email on Tuesday.

"NatWest is increasing customer protection against crypto-criminals after 329 million pounds was lost by consumers last year," the bank said.

(By Jamie Crawley)