Lancelot keeps his eyes lowered uncomfortably at that, focusing on Lily until he senses Siobhan moving and looks up. His eyes light up at the sketch and he grins at her, takes it to study it -- one hand gently restraining Lily from 'helping' with this.

"This is incredible! You're really very kind. Here --"

And he hands it back to her a moment so he can dig for his wallet, tugs out a twenty pound note to hold out to her with a smile.

"Here, and thank you again. Are you self taught, or...?"

Or did she learn from someone, attend art school? He wouldn't have pegged her as the type for art school, but sometimes appearances can be deceiving.