The best way to avoid a very heavy trailer from snaking is to load it correctly. Make sure that the weight is toward the front and there is little or no rear overhang.
The load deck of your transporter may be constructed using ply wood. This is obviously susceptible to water ingress and can become soft and lose its structural strength. There is nothing more embarassing than having a wheel break through the deck.
Disclaimer: Please do not rely upon the information on this page being correct. For up to date law changes and regulations please refer to the VOSA website.
Marking of rear overhang
Long Vehicle Marker Plates
Recommended maximum height