I can confirm Angulocaste. The Anguloa parent is probably clowesii or cliftonii. The Lycaste parent is probably a yellow one from Central America such as cruenta, aromatica, cochleata, consobrina, michelii.
Many thanks for your reply.I sure knew it wasn't lycaste skinneri alba .It originally came from an orchid friend who died many years ago so it has to be an old cross.Just having someone to agree that it has to be an angulocaste really helps me.Although I will never know the parents it will just be angulocaste ?-to me on the tag.