Cash ISA expert explains 'five-year' rule all savers should know / Cash ISA account holders could save thousands more with this alternative / How does the UK's Isa system compare with other countries? / Cash ISA criticism grows - but the different types of ISAs that could be alternatives / ISA millionaires are on the rise - here are the stocks and shares they invest in / 'British Isa' plan scrapped by government / Tax-free ISA accounts surge by billions as Britons store cash away in fear of new levies / Millions trapped in Help to Buy ISAs as house prices outstrip account allowances / Britons put record amount of money into ISAs / 'I'm an investment expert - this strategy works best for ISA investors'