Hello, I am Keith, one of the experts on Just Answer, and pleased to be able to help you with your question.
1. You can buy a new ready made company from many company formation providers. The Articles of Association are worded so loose these days to permit almost any legal activity to be undertaken.
2. Any surplus made by the company would be subject to Corporation Tax (CT) at 20%. You would be well advised to set up a Quatari company to mop up any profit from the company thus avoiding UK CT. Qatar does have a CT viz:
'Corporation tax is payable on a progressive scale on any income in excess of QR 100,001, from 10% up to a maximum rate of 35% on income in excess of QR 5 million. There are a number of allowable deductions including interest payments, salaries, rentals, depreciation etc' [source: Expat Focus]. However it applies mainly to foreign companies.
Alternatively the investors could take profits by billing the company for services.
3. Qatar has a Double Taxation Treaty with the UK. Any tax paid in the UK is allowable as a tax credit against any Qatar tax on the same stream.
4. When the company buys land in the UK then Stamp Duty Land Tax or its Scottish Equivalent will be payable.
5. You will need a Registered Office in that part of the UK in which you are located and have to complete annual CT declarations on line, you can file abbreviated accounts with Companies House CH) as you do this. There is also the Annual Return to CH to be filed.
I do hope that you have found my reply of assistance.