Bongo Fury

Possibly several questions in one here, I've done a brief search and not come up with the answers.

Butane isn't supposed to work properly in cold weather, exactly how cold are we talking and what changes do I need to make (if any) other than the regulator to use propane?

I'm taking my Bongo through the most expensive hole in the ground next summer, and EuroTunnel tell me that I can take gas but the bottle must be no more than 80% full. I've queried this with them and asked how I'm supposed to know and, more importantly, how they are going to verify it, and they tell me that they're only filled 80% full in the first place. Is this right, if so why do they have stupid rules which cannot fail to be complied with? Although being Europe I suppose we should expect this level of unnecessary bureaucracy

Butane gas stops evaporating at around -5 degrees, but I have never
had a problem with gas in a caravan external container, and inside the
Bongo you shouldn't get that cold. The problem is with domestic supply
bottles stored outside. Propane stops evaporating at around -40 degrees.

The empty weight of the gas container is marked (usually on the neck).
Weigh the bottle on bathroom scales and everything above the empty
weight is liquid gas.

A 10 Kg bottle has 10kg of liquid gas and is only filled to 80%.

Totally agree Ben - I can't see butane ever being a problem in a Bongo.

Bit puzzled about one thing though - why is your hair growing so much faster than Pat's?

I tried that Evergreen lawn fertilizer, worked a treat, but it wouldn't go green !!.