Yes, you can pay in 3 instalments. The size and timing of these instalments are as follows:
Instalment 1 - 10% of total balance within 24 hours of booking
Instalment 2 - 30% of total balance by 15th August
Instalment 3 - 60% of total balance 90 days pre arrival
Please check your TSW Booking Profile for exact payment dates as it depends on which event you are going to.