Using AWS?
Suddenly you get a message
"We notice that you have just filed your Tax Return and that you are due a refund of £123.46. From your recent browsing history may we suggest that you spend that money on ..."
Sorry, HMRC. Putting our Tax records out on AWS is just asking for a hack of mega proportions apart from the inevitable leaks into the Amazon data store which already knows more about us than we can remember.