Clearly, the gubberment doesn't want anybody to save.... You have to go out and spend it all to boost the economy....
I did my bit ~ I bought a new car (20% VAT )
My new car fund is about to get 'diverted' (but I like my current car)
Taxing interest on accounts has always been wrong imho. The man in the street should only get taxed on net interest/dividends minus inflation as that's the only net gain you actually get - in most years bugger all or a net loss. But it won't happen.
As for negative interest rates IIRC BM is in the Eurozone so they should already be in place after last week's announcements.