"Rob Morley" a écrit:

Lights aren't required if the vehicle isn't used at night,
indicators I'm not sure about - it used to be you could
use a bulb horn and hand signals on a trials bike.

It used to be the case that indicators, if fitted, had to be functional, but
weren't compulsory. I remember my brother removing the broken indicators
from his 125cc motorbike prior to an MOT test.

Googling finds:

http://www.motuk.co.uk/mcmanual_150.htm

If direction indicators are fitted they must meet the requirements of this
inspection, but need not be fitted to a machine which:

- cannot exceed 30mph / 50kph, or
- was first used before 1 August 1986, or
- 'off road' machines which are designed to carry only the rider.
- 'off road' machines with side car designed to carry the rider and one
passenger in the side car.

James Thomson