The event has been postponed to Sunday 16 February due to the hot weather on the on 3/2/2014 according to their website - "Due to the expected extreme temperatures and in the interest of public wellbeing and safety, this open day has been rescheduled for Sunday 16 February. We apologise for any inconvenience this may cause.
If you had previously booked to attend a tour at the Western Treatment Plant, you MUST rebook for the rescheduled date and time."