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If you operate through an Irish company you will pay Irish, not UK, Corporation Tax (CT). Here is the general guidance on Irish taxation from KPMG:
'The corporation tax rate is 12.5% for active income from the conduct of a trade in Ireland. A corporation tax rate of 25% applies to passive income and to income from certain defined activities. Capital gains are taxed at 33% with a participation exemption for gains on disposals of certain shareholdings of 5% or more of companies resident for corporate income tax purposes in EU or income tax treaty states where the company being disposed of or the Irish parent and its 5% subsidiaries taken together are wholly or mainly engaged in carrying on activities in the nature of a trade.'
If you reside in the UK for over 183 days in any tax year you are liable to UK taxation on your world wide income so payment through a tax haven will not be of any benefit to you.
I am s o sorry to have to rain on your parade.
Here is the Gov UK advice on the remittance basis:
'If you are taxable on the remittance basis you’re liable to UK tax in the normal way on your UK source income and gains. But you’re only liable to UK tax on any remittances (amounts) of foreign income and gains that you remit to the UK If you choose to be taxed on the remittance basis you must include these remittances on your tax return. The supplementary pages that you complete will depend on what it is that you have remitted. For example, you may need the ‘Capital gains summary’ pages, the ‘Employment’ pages or the ‘Foreign’ pages.'
Well, if you have disposed of all or part of the Irish company, then yes. If the dividends remitted to the UK then they constitute foreign income not foreign gains.
That is irrelevant, the income comes from foreign sources. Thus it is only taxable in your case on a remittance basis.