Spa Day 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: There is no time limit for this experiece.Group Size: This experience is for two people to share there will be other people at the venue.Weather Dependent: NoSpectators: You are welcome to bring family and friends but they will need to pay on the day.The minimum age for this experience is 16 years old.Availability: This experience is available Monday to Thursday subject to availability throughout the year.