I wouldn't risk it these days, insurance might rape you if you got caught being naughty.
I've done some bloody stupid things in my earlier times, such as towing a range rover on a 2 axle trailer from east anglia to scotland, with a METRO!!
Nigh on killed my poor little metro, shitting myself all the way, didn't go much above 30, even managed to get up the steep hill by the cathedral in Lincoln, just flat out in 1st gear had visions of it all going wrong, was real lucky with traffic in my favour!!
tabetha