Does London Waterloo underground go to other parts of the country?

Question

To Stratford-Upon-Avon, namely, or does it only offer transport within London?

Answer 1

The underground system only serves London. If you want to go to Stratford-Upon-Avon you need to take a train from Marylebone, nearest underground station for there is Edgware Road or Baker Street

Answer 2

London underground only offers transport to london, however, you can catch a train from London to Stratford-upon-Avon