On 28 August 1997, the appellants purchased two vessels (hull 425 - MT Theano and hull 426 - MT Ludovica) from the second respondent, then under construction in Japan. The appellants alleged that the vessels were to be suitable for carrying MTBE (methyl tert-butyl ether) in all cargo tanks, or alternatively that the second respondent had misrepresented this. The second respondent denied this, stating the specification only provided for MTBE capacity in approximately 25% of tanks. On 3 November 1998, the appellants arrested the first respondent's ship (MV Alam Tenggiri) under s 5(3) of the Admiralty Jurisdiction Regulation Act 105 of 1983 as security for their claims in London arbitration. The ship was released against two letters of undertaking from P & I Club Skuld, later replaced by Bank of Nova Scotia guarantees. The respondents successfully applied to Hurt J to set aside the arrest on the basis that the appellants failed to prove the Alam Tenggiri was an associated vessel. The judge declined to order return of the bank guarantees, finding he lacked jurisdiction as they conferred jurisdiction on the High Court of Justice in London.