A toilet system configured for use on board an aircraft comprising: a base support configured to be mounted on the aircraft, the base support including a right base support and a left base support; a toilet bowl; a right side support and a left side support each supporting the toilet bowl; a first locking mechanism configured to secure the toilet bowl to the aircraft by coupling the right base support to the right side support and coupling the left base support to the left side support; and a second locking mechanism configured to secure the toilet bowl to the aircraft by coupling the right base support to the right side support and coupling the left base support to the left side support; wherein the first locking mechanism and the second locking mechanism operate independent of each other characterised in that the left base support and the right base support are configured to engage the left side support and the right side support where the toilet bowl is lowered onto the support to at least partially engage the first locking mechanism; the second locking mechanism is arranged to be engaged by sliding the toilet bowl supported by the left side support and the right side support in a forward direction; the system comprising at least one pin (302, 304), the or each pin being configured to couple the right base support to the right side support and/or couple the left base support to the left side support in order to completely engage the first locking mechanism. a base support configured to be mounted on the aircraft, the base support including a right base support and a left base support; a toilet bowl; a right side support and a left side support each supporting the toilet bowl; a first locking mechanism configured to secure the toilet bowl to the aircraft by coupling the right base support to the right side support and coupling the left base support to the left side support; and a second locking mechanism configured to secure the toilet bowl to the aircraft by coupling the right base support to the right side support and coupling the left base support to the left side support; wherein a toilet bowl; a right side support and a left side support each supporting the toilet bowl; a first locking mechanism configured to secure the toilet bowl to the aircraft by coupling the right base support to the right side support and coupling the left base support to the left side support; and a second locking mechanism configured to secure the toilet bowl to the aircraft by coupling the right base support to the right side support and coupling the left base support to the left side support; wherein the first locking mechanism and the second locking mechanism operate independent of each other characterised in that the left base support and the right base support are configured to engage the left side support and the right side support where the toilet bowl is lowered onto the support to at least partially engage the first locking mechanism; the second locking mechanism is arranged to be engaged by sliding the toilet bowl supported by the left side support and the right side support in a forward direction; the system comprising at least one pin (302, 304), the or each pin being configured to couple the right base support to the right side support and/or couple the left base support to the left side support in order to completely engage the first locking mechanism.