Aqua Optima EVG401 Evolve Gold 90-day Water Filter, also fits Brita* Maxtra*,4 pack - 1 year's supply £12.92 (Prime) / £17.67 (non Prime) @ Amazon

Lowest in some time...

Fits both Aqua Optima & Brita Maxtra filter jugs, filter kettles and water chillers
Superior chlorine removal by up to 90%
Reduces herbicides, pesticides, lead and other heavy metals
Each filter lasts up to 90 days - 300 litres
4x Aqua Optima Evolve Gold 90-day-filter = 1 year's supply