Andy

the car is L reg (1994)

I converted that to English using Babelfish.  I can't stop laughing!  Here is the translation for the battery light:

When this indicator ignites, it announces an insufficiency of the load of the battery. The battery makes it possible to feed in electric power all the devices of edge (lighting external, radio, ventilation, lighting of the engine), but it must for that constantly be reloaded.
This load is ensured by the engine, through the alternator. This one is pulled by a belt, which thus turns only when the engine is moving. If it is insuffisament tended or if it breaks, the alternator does not fulfill any more its function and the battery discharges gradually.

If the witness ignites moving normal, one can continue to roll until being able to stop in full safety. Indeed, the battery does not discharge instantaneously. It is at this stage that one establishes the diagnosis by opening the cap. Mechanical fault of competence, it is possible to roll, with moderated pace, the garage nearest.

But attention! As curious as that can appear, a bad load of the battery can also involve an overheating engine. I am explained: the belt which actuates the alternator is sometimes also used for the water pump which allows the cooling of the engine. If it does not turn any more, the engine is likely to undergo serious mechanical problems (rupture of the cylinder head gasket etc).

Therefore, if this indicator ignites, not panic, roll to the garage nearest by supervising the temperature to the engine.

I think he has the orange version of the oil light and "If this witness flickers too a long time, it is absolutely necessary to make the appoint under penalty of destroying the engine shortly."