A snotty letter by an illiterate and incompetent fool.
Write back to the fool reminding him of the landowners common law duty to
- prevent flooding from their land to neighbouring land,
- not to do anything that increases that risk of flooding
- not to causes water to run off to neighbouring land
- deal with surface water to his land, not pass it to others.
Obviously, if the fool turns up on a sunny day, he wont find "any evidence of flooding issues"
If the council are the landlord, then it is their responsibility under common law.
Further, remind the fool of the potential for a Statutory Nuisance (EPA 1990), for which the landlord owner is again responsible.
And require the fool to record on their CRM system (and send you a copy and reference number) that when the rain water run off then freezes, if you your family or visitors slip and are injured, you hold the council landlord responsible.
I would also enquire about his specific knowledge of risk assessments and trip hazards and wheither he is making a qualified comment or just some retort to get his own back on you. After all you would not like to go to the expense of ordering work which the fool states is necessary when he is not even qualified to comment upon.
In fact, this should be going straight to a Stage 1 formal complaint.