Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.

Soon after, he released a cover version of Leo Sayer's When I Need You as a single, which reached number 5 in the British charts, as well as a follow up single called No Matter What I Do, which reached number 23.
He released a cover version of Leo Sayer's "When I Need You" as a single.  It reached number 5 in the British charts.  The follow up single called "No Matter What I Do" reached number 23 on the charts.