Inter-blade platform seal

An inter-blade platform comprising a seal configured to extend circumferentially about an axis and to be mounted between two axial ends of the inter-blade platform, the seal comprising at least a first part configured to be in contact with a first blade circumferentially adjacent to a first circumferential end of the platform, and at least a second part configured to be contact with a second blade circumferentially adjacent to a second circumferential end of the platform, the first part and the second part of the seal being distinct from each other and being configured to be fixed to each other such that a displacement in one circumferential direction of one of the first or second part of the seal causes a displacement of the other one of the first or second part of the seal in the same direction, when the first part and the second part of the seal are fixed to each other, wherein a first structural portion and/or a second structural portion of the seal comprises at least one tab, and the inter-blade platform comprises a box delimited by a flowpath wall to define an air flowpath, the box comprising at least one lateral passage, wherein the at least one lateral passage is an orifice formed in a lateral wall of the box configured to accommodate the at least one tab and to allow displacement of the seal extending on either side of the platform in a circumferential direction, radially under the flowpath wall.