Hello, I am Keith, one of the experts on Just Answer, and pleased to be able to help you with your question.
The Gov UK advice sheet on the subject is clear; it is:
'You must register an overseas company with Companies House if you want to set up a place of business in the UK.'
So if you are not using a place of business in the UK then there is no requirement to notify HMRC. The full advice can be found here:
The whole idea of offshore companies is to avoid UK taxation. All the big boys do it, Vodafone, Starbucks and Amazon are classic examples using tax haven companies to draw profits away from the UK tax authorities. Although the UK is attempting to stem this outflow these have not been particularly sucessful. There is one drawback. This is big business in tax havens and doesn't come cheap. The requirement to have local directors, registered offices all cost so the profits have to be large to support the infrastructure.
As far as tax is concerned that is a matter for the UAE and activities are not in general taxable in the UK. That is the whole point of an offshore company. Any emoluments paid to you as director resident in the UK would be subject to UK taxation. Under the Double Taxation Treaty between the UK and the UAE this cannot be taxed in both jurisdictions, the tax paid in one country being allowed as a tax credit against the liability in the other.
I do hope that you have found my reply of assistance.