Complex sentence: In the UK, he was well known for his concerts, which were broadcast on the BBC, as well as his recitals and broadcasts for the troops during World War II with the Entertainments National Service Association.
Split into simpler sentences: In the UK, he was well known for his concerts, which were broadcast on the BBC. He was also known for his recitals and broadcasts to the troops during World War II with the Entertainments National Service Association.