Ask an Immigration Solicitor. Get an Answer ASAP.
If you apply before your visa expires it does not matter that the Home Office can take up to 6 months to decide. It wouldn't affect your visa or status. You misunderstand the 28-day rule. What it means is that you can apply any time within 28 days of expiry but you must apply before your visa expires.
You are employed by your company. You are not self-employed. A company is a legal person,
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