A fuel injector for use in an internal combustion engine, the fuel injector comprising: an injector body comprising a bore; an injector needle located within the bore including a tip region engageable with a needle seat to control fuel injection through an injector outlet and, a generally frusto-conical end remote from the tip (P9 L28);an armature member, the armature member being engageable with an armature seat on the surface of the frusto-conical end of the injector needle, the injector needle in part and the armature member in part defining a control chamber; the end 102) of the injector needle comprising the armature seat defining an injector needle end profile (150, 152, 154), the armature seat being located on said end profile; an actuator arrangement arranged to control fuel pressure within the control chamber such that fuel pressure variations within the control chamber controls movement of the injector needle relative to the needle seat; the armature member being located between the injector needle and solenoid actuator, the control chamber therefore being located above the end of the needle; wherein the actuator arrangement is arranged to be capable of moving the armature member from a seated position in which it engages the armature seat to an unseated position in which the armature member has moved relative to the armature seat in order to bring the control chamber into fluid communication with a low pressure drain located around the end of the needle, and wherein the injector needle comprises an axial drilling in fluid communication with a source of high pressure fuel at a first end and in fluid communication with the control chamber at a second end. an injector body comprising a bore; an injector needle located within the bore including a tip region engageable with a needle seat to control fuel injection through an injector outlet and, a generally frusto-conical end remote from the tip (P9 L28);an armature member, the armature member being engageable with an armature seat on the surface of the frusto-conical end of the injector needle, the injector needle in part and the armature member in part defining a control chamber; the end 102) of the injector needle comprising the armature seat defining an injector needle end profile (150, 152, 154), the armature seat being located on said end profile; an actuator arrangement arranged to control fuel pressure within the control chamber such that fuel pressure variations within the control chamber controls movement of the injector needle relative to the needle seat; the armature member being located between the injector needle and solenoid actuator, the control chamber therefore being located above the end of the needle; wherein the actuator arrangement is arranged to be capable of moving the armature member from a seated position in which it engages the armature seat to an unseated position in which the armature member has moved relative to the armature seat in order to bring the control chamber into fluid communication with a low pressure drain located around the end of the needle, and wherein the injector needle comprises an axial drilling in fluid communication with a source of high pressure fuel at a first end and in fluid communication with the control chamber at a second end.