Allow parents to book after sessions have started, with automatic price adjustment.
By default, once sessions have started for a class, new bookings are blocked. You can enable mid-session booking to allow parents to join partway through a term.
When mid-session booking is enabled for a paid class, the price is automatically adjusted based on the number of remaining sessions. For example, if a 10-session class costs £50 and 4 sessions have passed, the pro-rata price will be £30 (6 remaining sessions out of 10).
The pro-rata price is shown clearly on the booking page so parents know what they're paying for.