Setting up a website business, help!!?

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Setting up a website business, help!!?

I would like to set up and run from home a website business! Once my feet are under the table I would like to set up a couple more.
Question is how should I go about this?? Do I set up an umbrella company with the small website businesses under this umbrella with different names. Or should I set up a partnership or sole trader. Can I so sole trader with several websites. Which of these has the least Tax implications?

Thank in advance1