Another compromised StB source was Will Owen, the MP for Morpeth, who was acquitted at his trial in 1970 but later admitted to MI5, after having been persuaded to confess by his colleague Leo Abse, to passing sensitive documents acquired through his membership of the Defence Estimates Committee. As revealed by Frolík and another defector, Frantiˇsek August, the StB was aggressive in exploiting British sympathies with the Czechs, and often acted as a surrogate for the KGB. Potential targets were cleared by the London KGB rezident who occasionally advised that a particular target was being “run by another stable”.