Methinks this chappie may be telling porkie pies as cable ties don't fit around the average tree, and one inch nails are not required on trees that are thin enough for cable ties IYSWIM. Nor would the average driving instructor be carrying nails in his first aid pack.
Having said that the 'magnanimous' terminology used in the council quote leaves a lot to be desired. Why did they telephone him if he had 48 hours from receiving the letter? Because they forgot to mention 'urban decay' in the letter?