Train season ticket types?

Basingstoke to London Terminals will just get you to Waterloo, Basingstoke to 1-6 gives you the Underground zones 1-6 as well - this adds about �16 a week to the season ticket price, which since a single ticket between Waterloo and Monument costs �4 cash or �1.80 if you have a pay-as-you-go Oyster card is good value if you're travelling more than 4 days a week with Oyster or 2 days a week if you're paying cash.