If you actually catch Ebola, you are far more likely to die of it than to die from flu if you have that. But you are very much more likely to catch flu than to be at risk from Ebola (which requires direct body fluid contact). So far more people will die in UK of flu than of Ebola.
It seems she is an HCP, returing from volunteering in Sierra Leone. She is currently stable and will shortly be transferred to Royal Free in London.
Officials have long predicted there would be one or more returing traveller cases here before the end of the year, and that if swiftly identified and isolated the risk of secondary infections would be extremely low.