Hello My partner just started working for a London bus operator and got her staff oyster card today. We however live in Grays, which is out outside the oyster 1-9 zones system so we assume her pass won't let her out as Grays is like Watford junction and it's own lettered zone. What's the beat cheapest ticket she can buy for her commute to work? Would it be to load some kinda of Grays to zone 6 ticket or something? And would this be paper or added to her oyster card?