All working now
I was reading up on the IVA section on Locostbuilders.com, new version was released on the 17/06/2013:
Rear fog lamps;
1. They must be operational
2. The correct number must be fitted to the vehicle (Table 1)
3. They must only emit a red light
4. The rear fog lamp(s) must only illuminate when dipped beam, main beam or front
fog lamps are lit (See Notes 3 & 4)
So note 3 and 4 says:
Note 3: front fog lamps may be illuminated with the side
lamps only.
And the important bit :-
Note 4: Either of the following applies:
1) The rear fog lamp(s) may continue to operate until the
position lamps are switched off, and the rear fog lamp(s)
must then remain off until deliberately switched on again
or
2) An audible warning, additional to the mandatory tell-tale
light, must be activated if the ignition is switched off or the
ignition key is withdrawn and the driver's door is opened,
whether the lamps in (RS4) are on or off, whilst the rear fog
lamp switch is in the "on" position.
On my Audi, there is no way of leaving them on as the stitch is part of the light switch.
If I leave the lights on and remove the key, I get a buzzer.
So on the Lambo, I will need to figure out the same. Some people are putting in relays.
There is a company stating the have a fix for this too - CARTEK Automotive