Channel Tunnel Train X ing

[77racing]

I am taking my MotorHome and car trailer to Spa Belgium next year and need to do the crossing on the channel tunnel train because we are taking a dog with us and he can,t go in a cage on the ferry,s. The set up will be about 14 metres long.So does anyone have advise as to who to go through, discount codes, height restrictions and general info to help smooth the trip. Ferrysavers.com has been my first port of call