To be fair, the pilot report stated:
The collision could have been avoided if the pilot of N56200 had ensured that the area into which it taxied was clear of obstructions, either by observation, or the use of wing-walkers or marshallers.
A quick look at the ANO
137 Endangering safety of an aircraft
A person must not recklessly or negligently act in a manner likely to endanger an aircraft, or any person in an aircraft.
138 Endangering safety of any person or property
A person must not recklessly or negligently cause or permit an aircraft to endanger any person or property.
Sooooooo, was the (admitted) omission of wing walker/observation reckless or negligent?
