Not that I trust any paper especially, but the Telegraph says the bugged conversation took place relatively early in the day, then they left the car, subsequently travelled by bus and eventually walked, which was when they were seen observing the tourist spots. So if the Telegraph report is accurate it would be an unjustified linkage between the conversation and the observation, unless the conversation itself named those places. This isn't to defend them in any way, but generally speaking getting the detail right is important to ensure the scope for appeals is minimised.