I read somewhere that you can't take your MH through the Chunnel with an underslung tank mate, even cars with them fitted arnt allowed over, would this be right ? If so you won't be back to France with the hymer then .
This from the Tunnel website:
Vehicles powered by LPG or equivalent flammable gas as well as dual powered vehicles (vehicles fitted with an LPG or equivalent flammable gas tank as an alternative fuel) cannot be accepted for transport by Eurotunnel Le Shuttle, even if:
the LPG or equivalent flammable gas tank is empty
the LPG or equivalent flammable gas mode of the vehicle is not selected
For the purposes of this text, this means fixed containers that are permanently installed or fixed in a vehicle and are refillable from outside the vehicle.
Gas used for domestic services
If travelling with a campervan, caravan or any other vehicle fitted with cooking facilities, any flammable gas container must be declared when asked and will be checked at the appropriate checkpoint by Eurotunnel Le Shuttle
Fixed gas containers (tanks, etc.)
The quantity of gas is limited to 47kg (or approximately 93 litres) maximum for a single container and to 50kg (or approximately 99 litres) maximum in the case of several containers. Each container must be no more than 80% full.
The quantity will be checked via the gauge or remote indicator but if neither are present, the vehicle will be refused.
Combination of portable and fixed containers
If your vehicle is fitted with a combination of portable and fixed containers, the quantity of gas is limited to 50kg (or approximately 99 litres) maximum and the rules previously described apply.
Note:
All containers and/or gauges/indicators must be of easy access by our staff for any check. Gas containers must be switched off whilst travelling and connection systems must be in good condition. Opening the container tap or using domestic services as described above is strictly forbidden until the vehicle has unloaded at the arrival Terminal