ADR question do i need ADR licence to transport 2 x 18 kg LPG gas bottles . approx 1 mile on a public road between our 2 wharhouses in a tri axle curtainsider without any warning symbols.
Do you need an ADR to drive a caravan? 
i dont drive caravans i ve driven a car that pulled one once tho what im asking is . is there a certain amount of bottles that can be carried or actual volume of LPG gas carried in total before ADR rules come into play
The HSE publication “Working with ADR”
http://www.hse.gov.uk/pubns/cdg.pdf ( I found it by searching the HSE website for ADR if the link doesn’t work)
gives thresholds below which are exempt for ADR
for gases the threshold is 333 kg ( or in some cases litres)
SO your gas cylinders are not a problem 