Travelcard

Travelcard If I buy a 1-day Travelcard (Zone 1-9), can I use it to go from London downtown to Gatwick?

If I buy a 1-day Travelcard (Zone 1-9), can I use it to go from London downtown to Gatwick?

Does a one day Travelcard cover buses?Can you use Travelcard to Gatwick?Is Travelcard valid on buses?Is Travelcard valid on Gatwick Express?How much i...