quick question. bailiffs clamp my friends car over unpaid council ticket. he sat in the car and bailiff called the police. informed him he was committing the offence of obstructing an enforcement officer and will be arrested. officers radioed control who said to go ahead and arrest them can they do this

I had a PCN from a council for £202 for a hire purchase car, bailiff sent me a letter on March 24, 2014 for £431 I filed an out of time declaration because I had never received an NTO on 11 April 2014, On June1 I got letter from the court TEC, saying that the council had refused the declaration.I did not recieve any letter for council or bailiffs (now called enforcement agents) Today 20th June 2014, I received a call from newlyn enforcement agent saying that they have clamped the car on my drive way. The agent said over the phone that the charge is now £666.11, which is £202 for PCN, £229.11 for compliance stage fee and £235 for enforcement stage fee. QUESTIONS: I thought i was supposed to receive a 7 days(11days including weekends) compliance letter charge....I never received this. I thought the whole idea of the 7days compliance was to give me the opportunity to pay the £202+£75 and save the trouble of a visit. I was not give this opportunity . I told the EA that the car is on hire purchase and does not belong to me , that he is not supposed to clamp it and threaten to recover it. is this correct ? I also wanted to find out if a car packed on my drive way can be clamped by an enforcement agent. Is my drive way not private property? Since i was not given the 7 days compliance letter and hence not given the opportunity to pay the £75, what can i do to get the EA to revert back to that stage as it seems obvious they failed to send the 7days letter ...so they can get more money if they visit. Any help would be appreciated