You were paying the fine in instalments when bailiffs attended

When the bailiff sends a Notice of Enforcement,^[1] he earns a compliance stage fee of £75.^[2]

When the bailiff attends, he earns the enforcement stage fee £235.^[3]

If you set up a repayment schedule with the court, or the bailiff when you first received the Notice of Enforcement, then the bailiff stands to lose the £235 enforcement stage fee.

The bailiff attended so he can add the enforcement stage fee to the sum outstanding.

Do a change of circumstances.^[4] That ends the enforcement power,^[5] and cancels all the bailiff’s fees and charges.^[6]

^{[1] Paragraph 10 of Schedule 12 of the Tribunals, Courts and Enforcement Act 2007
[2] Regulation 5(a) of the Taking Control of Goods (Fees) Regulations 2014
[3] Regulation 5(b) of the Taking Control of Goods (Fees) Regulations 2014
[4] See Court fines: Do a change of circumstances
[5] Paragraph 6(3) of Schedule 12 of the Tribunals, Courts and Enforcement Act 2007
[6] Regulation 17(1) of the Taking Control of Goods (Fees) Regulations 2014}