Quick update - we've gone thru the MRI scans and biopsy at an animal health trust and have been given the worst possible scenario. Our beautiful cat has an incurable tumour at the back of her nose

The vet has suggested radiotherapy but this will only add a few more months onto her life in which she would still continue to struggle with her symptoms. We've decided to provide her with some quality of life and not put her through anymore trips in the carrier. She's still quite bright and still eating for now, altho we fear the symptoms worsening and making that very awful decision to end her suffering. Seems so unfair with her being only 4yrs old...really heart breaking. Its so rare for a cat to have this at her age and it was always dismissed in the early days so its been a real shock to now be facing the unimaginable. Thank you for your comments anyway, and its been good to have a place to read and offload a bit about the process.