Friendly visitor needed for a 73-year-old neighbor in London

I'm writing for my neighbor Paisley, who's 73. Paisley lives alone in London, and lost a son last year. The nearest family lives on the other side of the country. Paisley loves birdwatching, and would enjoy someone to chat with. An hour a week, perhaps on Monday afternoon, would mean the world. We can also arrange a phone call if you can't visit in person. All visitors will be introduced by me and I'll be there at the first meeting. I'll share references and, if you'd like, a short orientation from the local befriending charity. No special skills are needed - just kindness and patience. Thank you so much.