Heater for an aerosol provision device

A heater (350) for an aerosol provision device (100) configured to heat an article (50) containing aerosol generating material is disclosed. The heater includes an elongate housing (302) with an inner surface, and a heating coil (351) in the housing (302). The heating coil (351) comprises a length of heating material (610) shaped into a coil (351), and a surface of the length of the heating material (610) comprises a first area (606), a second area (608), and a third area (612). The first area (606) comprises the part of the surface which could touch the inner surface of the housing when the heating coil is located within the inner housing. The second area (608) comprises a part of the surface which could touch another part of the surface of the heating material when the heating coil is located within the inner housing. The third area (612) comprises the part of the surface which could not touch either of the inner surface of the housing or another part of the surface of the length of heating material (610) w