An intervertebral implant comprising: a core having a core body which is elongate in an insertion direction and has a rear end and a front end that is spaced from the rear end along the insertion direction, and first and second outer surfaces (30, 34) which are spaced apart from one another along a first direction which is perpendicular to the insertion direction, an end plate that defines a bone facing surface and an inner surface that is opposite the bone facing surface, the end plate further defining a first attachment member at a first end of the end plate and a second attachment member at a second end of the end plate that is spaced from the first attachment member along the insertion direction, the end plate being attached to the core body by means of the first and second attachment members in such a way that it can move relative to the core body, and such that at least a portion of the inner surface faces the core and is spaced from the core by a first distance (D 1) measured along the first direction, in which the end plate is flexible and is configured to move resiliently towards the core along the first direction so that the said portion of the inner surface becomes spaced from the core by a second distance measured along the first direction that is less than the first distance, characterised in that the end plate is attached by means of the first and second attachment members at the first and second ends of the end plate to one of the outer surfaces of the core body, and at least one of the first and second ends of the end plate is configured to slide along the outer surface of the core body along the insertion direction when the end plate moves resiliently towards the core along the first direction. a core having a core body which is elongate in an insertion direction and has a rear end and a front end that is spaced from the rear end along the insertion direction, and first and second outer surfaces (30, 34) which are spaced apart from one another along a first direction which is perpendicular to the insertion direction, an end plate that defines a bone facing surface and an inner surface that is opposite the bone facing surface, the end plate further defining a first attachment member at a first end of the end plate and a second attachment member at a second end of the end plate that is spaced from the first attachment member along the insertion direction, the end plate being attached to the core body by means of the first and second attachment members in such a way that it can move relative to the core body, and such that at least a portion of the inner surface faces the core and is spaced from the core by a first distance (D 1) measured along the first direction, in which the end plate is flexible and is configured to move resiliently towards the core along the first direction so that the said portion of the inner surface becomes spaced from the core by a second distance measured along the first direction that is less than the first distance, characterised in that the end plate is attached by means of the first and second attachment members at the first and second ends of the end plate to one of the outer surfaces of the core body, and at least one of the first and second ends of the end plate is configured to slide along the outer surface of the core body along the insertion direction when the end plate moves resiliently towards the core along the first direction.