I have recently received a parking charge notice for going 50 minutes over a three hour free parking period at a local shopping centre. It is for £85 or £50 if paid within 14 days. I accept that I went over the period, so I would accept paying a reasonable amount - but £50 seems extortionate.

I have been told by friends to ignore it and not to pay as it is unenforceable. I had considered contacting the parking firm to tell them that I am not willing to pay such a disproportionate amount, including a receipt to show I was using the shops - and even including a cheque for £5 to cover the £1 it would have cost me to stay an extra hour and £4 to cover their admin costs.

Should I enter into a dialogue with them like this, or would I be better off ignoring their letters all together? Thank you