For those of you guys who are still interested in this saga may I include a reply from the PSNI received this morning.
"Having given due cognisance to the media interest surrounding the use of electric bicycles in Northern Ireland, Roads Policing have recently issued the following by way of advice and guidance to all officers and staff.
Great Britain made Electrically Assisted Cycle Regulations in 1983. These regulations served to define and regularise the construction of electric cycles and placed them outside the definition of a motor vehicle thereby treating them much as regular cycles but with restrictions upon the power output and top speed.
Northern Ireland made provision in the Road Traffic (N.I.) Order 1995 for similar regulations which were not replicated at that time. This means that electric bicycles are still regarded as a motor cycle and consequently to be registered with the DVLA, the rider must undertake CBT, wear protective headgear and insure the vehicle.
We understand that it is a concern for people who simply want to comply with the law and enjoy their electric cycle in the same way that those in Great Britain are able to do. While of course any individual police officer will always have discretion to deal with matters as they deem appropriate and according to the individual circumstances that prevail, it is not for the Chief Constable to issue directions that the law, as it applies with regard to electric cycle users, should be disregarded.
I trust that this be of assistance to you at this time."