Did you ask for court costs at the original hearing? if so did the tenant pay them? if not add them to the form, add on the bailiffs fee of £110
the risk assessment is the small tear off slip at the bottom of the form, it asks whether you think the bailiff will need the police present etc. You need to complete this appropriately - yes if the tenant is likely to be violent, no if not, and send it to the bailiffs office in plenty of time.
My advice is not based on formal legal training but experience gained in 20+ years in the letting industry.