CATT allows the officers to work through the volume of solicitations and use algorithms to examine the word usage and conversation patterns by a suspect. Officers at the Yard, in turn, asked Humberside police to interview Harry after tracing him to his plant and machinery business in the force's area. Newcomers can identify themselves as a man, woman, trans person, couple, or group, create a personals ad, and start flirting with sexually active people in their area.