Can a bailiff remove a car without the owner present?

Yes

If the debtor has been given a Notice of Enforcement,^[1] then the bailiff may take control of the debtors goods when a period of seven clear days has passed.^[2]

If the Debtor's car is found on a highway,^[3] or where the debtor usually lives or carries on a trade or business,^[4] the bailiff make take control of it,^[5] and one of the methods of taking control of goods is by removing it to a place of storage.^[6]

^{[1] Paragraph 7.1 of Schedule 12 of the Tribunals, Courts and Enforcement Act 2007
[2] Regulation 6(1) of the Taking Control of Goods Regulations 2013
[3] Paragraph 9(a) of Schedule 12 of the Tribunals, Courts and Enforcement Act 2007
[4] Paragraph 14(6) of Schedule 12 of the Tribunals, Courts and Enforcement Act 2007
[5] Paragraph 13 of Schedule 12 of the Tribunals, Courts and Enforcement Act 2007
[6] Regulation 18 of the Taking Control of Goods Regulations 2013}