McCANN AND OTHERS v. THE UNITED KINGDOM JUDGMENT 10 did not recognise them. At the inquest, under cross-examination, he at first did not recall that he had been given any of the aliases that the three suspects might be employing. Then, however, he thought that he remembered the name of Coyne being mentioned in relation to Savage and that at the time he must have known the aliases of all three, as must the Spanish officers. Chief Inspector Ullger, who had briefed Huart however, had no recollection of the name of Coyne being mentioned before 6 March and he only recalled the name of Reilly in respect of McCann. However, if Huart recalled it, he did not doubt that it was so. 34. On the Gibraltar side of the border, the customs officers and police normally on duty were not informed or involved in the surveillance on the basis that this would involve information being provided to an excessive number of people. No steps were taken to slow down the line of cars as they entered or to scrutinise all passports since it was felt that this might put the suspects on guard. There was, however, a separate surveillance team at the border and, in the area of the airfield nearby, an arrest group. Witness M who led a surveillance team at the frontier expressed disappointment at the apparent lack of co-operation between the various groups involved in Gibraltar but he understood that matters were arranged that way as a matter of security. 35. At the inquest, Chief Inspector Ullger stated, when pressed about the failure to take more scrupulous measures on the Gibraltar side, "In this particular case, we are talking about dangerous terrorists. We were talking about a very, very major and delicate operation - an operation that had to succeed. I think the only way it could have succeeded is to allow the terrorists to come in and for the terrorists to have been dealt with in the way they were dealt with as far as the surveillance is concerned." 36. While Soldiers E and F made reference to the preferred military option as being to intercept and arrest the suspects in the frontier area, it appears not to have been pursued with any conviction, on the assumption that identification would not be possible in light of the brief time available for identification to be made (10 to 15 seconds per car) and the lack of prior warning from the Spanish side. 3. Arrest options: Advisory Group policy 37. Soldier F stated that the military option had been refined down to the preferred option of arresting the suspects when they were on foot in the assembly area, to disarm them and then to defuse the bomb. He referred also to four key indicators formulated by the Advisory Group with a view to guiding the Commissioner: 1. if a car was driven into Gibraltar and parked in the assembly area by an identified member of the active service unit;