wiwivovo As the website description, comapnion ticket can be used with saver day pass. However, i printed the companion ticket shown that it can only be used with a GA Travelcard or Day Pass for the Half Fare Travelcard.
FatimaH Hello wiwivovo Thank you for your query. You can also combine the comapnion ticket with the Saver Day Pass. I wish you a nice trip. Greetings, FatimaH