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In a sealing arrangement between two discs of a gas turbine engine a split sealing arrangement comprising a pair of sealing formations each made up of a plurality of sealing segments is provided. Each of the segments has a root accommodated in serrations of the discs. The roots of the sealing segmen

In a sealing arrangement between two discs of a gas turbine engine a split sealing arrangement comprising a pair of sealing formations each made up of a plurality of sealing segments is provided. Each of the segments has a root accommodated in serrations of the discs. The roots of the sealing segments are positively connected to roots of the rotor blades by dovetail or T-shaped tongues and grooves. The sealing segments are also provided with internal cooling passages.

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[ We claim:] [1.] A sealing arrangement between two axially spaced adjacent discs of a gas turbine, the rotor discs having serrations in their periphery, the rotor and discs having rotor blades, the rotor blades having roots locating in the serrations in the rotor discs, the rotor blades having blad

[ We claim:] [1.] A sealing arrangement between two axially spaced adjacent discs of a gas turbine, the rotor discs having serrations in their periphery, the rotor and discs having rotor blades, the rotor blades having roots locating in the serrations in the rotor discs, the rotor blades having blade platforms, the sealing arrangement including, on each said rotor disk, a circumferentially extending sealing formation extending from the rotor disc axially towards the other rotor disc and bridging part of the axial spaced the two rotor discs, the two sealing formations having free ends which cooperate to form a seal, each sealing formation comprising a plurality of segments, each segment having a root locating in the rotor disc serrations with said root of each segment extending substantially radially from each segment, the root of each segment being located in the same disc serrations as a root of a rotor blade, the root of the each segment being removably connected to the root of the respective one of the rotor blades to restrain said segment against axial movement out of the serration, the root of each blade having an axial upstream face and an axial downstream face, the root of each segment having an axial face, each connection comprising complementary positive interlocking formations on the axial face of the root of the segment and the corresponding axial face of the root of the rotor blade.