No. [There's a brief flare of irritation in his voice, followed by a pause.] Sometimes. When work was light. I paid him back, though. We each pay for half of everything. He was looking for a flatmate because flats are expensive in London. That's how we met.

[John isn't really sure how to square that with what he knows of Sherlock's financial situation, but this isn't really Alfie's business, anyway.]