Complex sentence: Some members of the House of Lords are grouped in this designation due to political scandals which have resulted in members either leaving their party groups or being expelled, whereas others left their party group without scandal for personal convictions.
Split into simpler sentences: Some members of the House of Lords are grouped in this designation due to political scandals which have resulted in members either leaving their party groups or being expelled. Whereas others left their party group without scandal for personal convictions.