Conversation so far:
Is Simon in England from this Simon & Garfunkel article an album or an actual trip to England?
Simon moved to England, where he had previously visited and played some gigs.
What did Simon from Simon & Garfunkel do in england after he moved to England?
A small music publishing company, Lorna Music, licensed Carlos Dominguez, a single Simon had recorded two years prior as Paul Kane, for a cover by Val Doonican that sold well.
Was Simon from Simon & Garfunkel  still performing music when he moved to England?
Simon toured small folk clubs.
Did Simon in England release any successful songs?
Simon's landlady had compiled a tape from his work and sent it to the BBC. The demos aired on the Five to Ten morning show, and were instantly successful.

Question: When was this released?
Self-contained rewrite: When were the demos that Simon's landlady sent to the BBC released?