Zend certified PHP/Magento developer

VAT not added to products in Magento 2.4 anymore

Up until yesterday morning UK VAT was being added to products as it should.
Out of the blue, the prices started appearing ex VAT
To my knowledge everything is set up as it should be as it was working but now its not and I have no clue what has stopped it adding VAT.
Default Country is UK, Default Shipping Country UK.
I have VAT Standard 20% and VAT Zero 0% set up.
Admin prices are entered Ex VAT, Catalog prices are set to show including VAT but are showing ex VAT.
Please can anyone suggest anything to try, I have read through numerous VAT/Tax problems and tried the solutions to no avail and I am slowly going crazy.

I sell Zero Rated Products and products at standard 20% rate.
I also ship to other non EU Countries such as USA, Canada etc and need these to show as Zero VAT also.