Bailiffs paperwork is not in my real name, is the enforcement still valid?

No

The debtor must be a legal entity.

That is either a person, or a company.

If the enforcement power is in the name of a fictitious entity, then the entity cannot own any goods and therefore, the debt cannot be enforced by taking control of goods.

The law says the bailiff may only take control of goods if they belong to the debtor.^[1]

If bailiffs take control of goods belonging to a non-existent entity, the owner of the goods may make a third party claim to controlled goods.^[2]

^{[1] Paragraph 10 of Schedule 12 of the Tribunals Courts and Enforcement Act 2007
[2] See Making a claim to controlled or executed goods}