A component for a gas turbine engine, comprising: a platform having a first path side and a second path side; and a platform cooling circuit disposed on one of said first path side and said second path side of said platform, wherein said platform cooling circuit includes: a first core cavity; and a second core cavity that is adjacent to said first core cavity, characterised by: a serpentine cavity in fluid communication with said first core cavity and said second core cavity, wherein said serpentine cavity includes a first serpentine portion in fluid communication with said first core cavity and a second serpentine portion in fluid communication with a second core cavity, such that the first core cavity feeds a cooling airflow into an inlet of said first serpentine portion of the serpentine cavity, and the second core cavity feeds said cooling airflow into an inlet of said second serpentine portion of the serpentine cavity; and a cover plate positioned to cover at least said serpentine cavity. a platform having a first path side and a second path side; and a platform cooling circuit disposed on one of said first path side and said second path side of said platform, wherein said platform cooling circuit includes: a first core cavity; and a second core cavity that is adjacent to said first core cavity, characterised by: a serpentine cavity in fluid communication with said first core cavity and said second core cavity, wherein said serpentine cavity includes a first serpentine portion in fluid communication with said first core cavity and a second serpentine portion in fluid communication with a second core cavity, such that the first core cavity feeds a cooling airflow into an inlet of said first serpentine portion of the serpentine cavity, and the second core cavity feeds said cooling airflow into an inlet of said second serpentine portion of the serpentine cavity; and a cover plate positioned to cover at least said serpentine cavity. a first core cavity; and a second core cavity that is adjacent to said first core cavity, characterised by: a serpentine cavity in fluid communication with said first core cavity and said second core cavity, wherein said serpentine cavity includes a first serpentine portion in fluid communication with said first core cavity and a second serpentine portion in fluid communication with a second core cavity, such that the first core cavity feeds a cooling airflow into an inlet of said first serpentine portion of the serpentine cavity, and the second core cavity feeds said cooling airflow into an inlet of said second serpentine portion of the serpentine cavity; and a cover plate positioned to cover at least said serpentine cavity. a serpentine cavity in fluid communication with said first core cavity and said second core cavity, wherein said serpentine cavity includes a first serpentine portion in fluid communication with said first core cavity and a second serpentine portion in fluid communication with a second core cavity, such that the first core cavity feeds a cooling airflow into an inlet of said first serpentine portion of the serpentine cavity, and the second core cavity feeds said cooling airflow into an inlet of said second serpentine portion of the serpentine cavity; and a cover plate positioned to cover at least said serpentine cavity.