A Constable can stop you to inspect the bike, if you fail to stop that's obstruction and an offence in its own right as is if you refuse to cooperate. If you do not have the required working brakes you can be fined up to £1000, (scale level three fine) you can't be given a fixed penalty notice for the offence and have to be prosecuted and fined by the judiciary. IANAL and you are a bell end.
A Constable can stop you to inspect the bike, if you fail to stop that's obstruction and an offence in its own right as is if you refuse to cooperate. If you do not have the required working brakes you can be fined up to £1000, (scale level three fine) you can't be given a fixed penalty notice for the offence and have to be prosecuted and fined by the judiciary. IANAL and you are a bell end.