Richard Wastcoat, managzing director of the UK arm of fund giant Fidelity, said: 'Isas will continue to offer shelter from CGT and income tax. This means higher rate tax payers will have no additional income tax liability and basic rate tax-payers can ensure that their investments remain sheltered from tax should their circumstances or tax rates change. And, of course, there's no need for investors to declare their Isas on their tax returns.