She's giving him an order, which means he doesn't have a choice. But it's always more polite to maintain the illusion that he does, so Sylvia waits for him to agree before nodding, and then takes a sip of her tea. The fact that Hillingdon are more likely to listen to one of their own is exactly why she wants someone on the inside. She's glad that he understands that.

"Thank you," she says, voice soft. "Anything you find out, report directly to me. You'll be my direct channel to Hillingdon. Understood?"

The fewer people that know about this, the better. Best to keep it under wraps.