The Civil Procedure (Amendment) Rules 1999

4.  In rule 3.1, after paragraph (6), insert–

(6A) Where a party pays money into court following an order under paragraph (3) or (5), the money shall be security for any sum payable by that party to any other party in the proceedings, subject to the right of a defendant under rule 37.2 to treat all or part of any money paid into court as a Part 36 payment.

(Rule 36.2 explains what is meant by a Part 36 payment).