A safety valve including at least one tubular housing having an interior surface. A flow path provided within an interior of the at least one tubular housing. A movable flow path blocking member arranged to block the flow path in a closed condition of the blocking member and open the flow path in an open condition of the blocking member. A first seal bore on the interior surface of the at least one tubular housing. A hydraulic control chamber within a wall of the at least one tubular housing; and, a second seal bore on the interior surface of the at least one tubular housing; wherein the hydraulic control chamber is disposed longitudinally between the first and second seal bores. The second seal bore is disposed longitudinally between the hydraulic control chamber and the movable flow path blocking member. Also included is a method of accommodating a high control pressure wireline insert safety valve within a tubing retrievable safety valve.