A wellhead system, comprising: a first wellhead assembly; and a second wellhead assembly, comprising: a load member adapted to be actuated to engage the first wellhead assembly to enable the first wellhead assembly to support the second wellhead assembly; and a resilient actuation member adapted to actuate the load member at a desired position relative to the first wellhead assembly and engage a portion of the first wellhead assembly, the actuation member comprising a first engagement portion and the second wellhead assembly comprising a second engagement portion, the first and second engagement portions (48, 52) being adapted to cooperate to restrict axial movement of a main body of the second wellhead assembly in a first direction relative to the actuation member; wherein the resilient actuation member is adapted to block movement of the load member in the first direction after the resilient actuation member engages the portion of the first wellhead assembly; and characterised in that: the resilient actuation member is configured to elastically deform to enable axial movement of the main body of the second wellhead assembly in the first direction relative to the actuation member when a sufficient force is applied to the actuation member. a first wellhead assembly; and a second wellhead assembly, comprising: a load member adapted to be actuated to engage the first wellhead assembly to enable the first wellhead assembly to support the second wellhead assembly; and a resilient actuation member adapted to actuate the load member at a desired position relative to the first wellhead assembly and engage a portion of the first wellhead assembly, the actuation member comprising a first engagement portion and the second wellhead assembly comprising a second engagement portion, the first and second engagement portions (48, 52) being adapted to cooperate to restrict axial movement of a main body of the second wellhead assembly in a first direction relative to the actuation member; wherein the resilient actuation member is adapted to block movement of the load member in the first direction after the resilient actuation member engages the portion of the first wellhead assembly; and characterised in that: the resilient actuation member is configured to elastically deform to enable axial movement of the main body of the second wellhead assembly in the first direction relative to the actuation member when a sufficient force is applied to the actuation member. a load member adapted to be actuated to engage the first wellhead assembly to enable the first wellhead assembly to support the second wellhead assembly; and a resilient actuation member adapted to actuate the load member at a desired position relative to the first wellhead assembly and engage a portion of the first wellhead assembly, the actuation member comprising a first engagement portion and the second wellhead assembly comprising a second engagement portion, the first and second engagement portions (48, 52) being adapted to cooperate to restrict axial movement of a main body of the second wellhead assembly in a first direction relative to the actuation member; wherein the resilient actuation member is adapted to block movement of the load member in the first direction after the resilient actuation member engages the portion of the first wellhead assembly; and characterised in that: the resilient actuation member is configured to elastically deform to enable axial movement of the main body of the second wellhead assembly in the first direction relative to the actuation member when a sufficient force is applied to the actuation member.