Actuator

An actuator comprising:

• a housing comprising at least one chamber for holding a fluid;
• a piston comprising an axis, the piston positioned partially within the chamber;
• and
• a seal positioned between the piston and the housing, the seal configured to isolate a fluid in the chamber;
• wherein the piston and the housing are configured to move relative to each other along the axis;
• wherein one of the piston or the housing comprises a seal groove in which the seal is positioned, the seal comprising a seal body and an energiser, the energiser biasing the seal body against the other of the piston or the housing;
• wherein the actuator comprises at least one pressure relief conduit located between the energiser and the chamber, and configured to relieve fluid pressure built up in the region between the energiser and the chamber.