When it came to overall customer satisfaction levels, Heathrow Connect came in the top three at 94%. But the same operator saw a marked fall in its value for money rating - dropping 6% over the last year to 52%.
First Capital Connect (81%) and Southern (82%) were among the lowest-rated for overall satisfaction - at 81% and 82% respectively.
More top news
David Cameron's former strategy adviser Steve Hilton says he could possibly run for the post of London mayor.
Rio Ferdinand has described being "overwhelmed" by the support he received from football fans after his wife died.
Gurav Sharma stabbed Mohammed Afzal to death in an attack on a street in Southall last August.