Practice and Procedure - Application to strike out claim as disclosing no reasonable cause of action - Application to amend Particulars of Claim in the face of striking out application - Application before Case Management -Whether amendment can take place without permission of court - Rules 20.1, 20.2 , 20.4 of the CPR - Whether Rule 20.1 allows more than one amendment of Statement of Case without Court’s permission - Principles guiding court -Whether Claimant has a real prospect of succeeding on the amendments at trial - Need for evidence upon which to find real prospect of success - Whether application disingenuous or insincere