Is it the “Aussie flu”? The short answer is simply “No”. There is an influenza type B virus dominating the UK right now, not an influenza type A virus. It was A (H3N2) viruses which dominated in Aus this past Flu season.
The longer answer (but please do go and read the entire piece!) is that it’s not easy to tell in a heavily travelled world constantly and rapidly producing and moving flu strains around it.