If you buy a Day Pass, you'll retain all the minutes on your account. Any journeys you take while your Day Pass is active will be covered by your Day Pass. As soon as your Day Pass expires you'll return to using your minutes balance for journeys.
Please note: the promotion code FREEDAYLDN is only valid for hiring a bike and riding within our London operating zone. If you use this code to purchase a Day Pass and use it in any another scheme, the Day Pass will not be active and you will be charged on a Pay as you Ride basis or minutes will be deducted from your balance.