Private health insurance

Hello, 

 I'm a concerned husband and was wondering if I could ask if anyone has been in a similar situation and if they had any information to help me please, 

My wife has been fast tracked on the NHS cancer service, she has not had a diagnosis, but I'm am wondering if I set a private health care plan up this would speed things up, would a private health insurance plan cover with her not having a diagnosis ? And if anyone knows of any health insurance companies that do this. 

A long shot I know but I thought I woukd ask as carnt find anything on the net to help. 

 Thank you for help x