Spa Day With Afternoon Tea for Two at Riverhills - Key InfoVoucher Validation Your voucher is valid until 01 Jul 20 You must validate book and use your voucher within the voucher expiry date.Duration: The treatment will last approximately 25 minutes per person.Group Size: This experience is for two people to enjoy there will be other people there on the day.Weather Dependent: NoSpectators: Unfortunately this experience is not suitable for spectators.The minimum age is 16 years old.Availability: This experience is available Monday to Thursday subject to availability. throughout the year