When I interrupted the hon. Member for Belfast, West (Mr. Fitt), I said that on occasions people were not brought to trial because there was not evidence available that would enable a jury to convict, but that there was in the minds of the police and the Home Secretary sufficient evidence to cause them—I do not have the exact phraseology—to be convinced that there were reasonable grounds for suspicion that they were engaged, or might be engaged, in terrorist activity. I do not have the exact formula, but that is the difference.