Thank you sis,makes sense now, Carcinomatosis is when cells from a primary cancer spread to form many tumours throughout the body or to a large area of the body,so poor Winnifred had breast cancer and it spread throughout her system, I'm guessing it was too much for her heart,hence the failure,maybe a blessing in disguise.
This cert is one added to a batch I have, I need to prove to the records "officer" of the Addenbrook hospital my connection to her to get records of her nursing training, I'm realy hoping there might be a photo attached, when she died her husband threw out everything to do with her,every photo etc, one of her sons is still alive and doesn't know what she looked like.