I have been transporting artworks around the country since 2010. I always dedicate a journey to just the work of art. You wont find your Anthony Gormley rubbing shoulders with a rusty old bike, the may cost a little more, but worth the peace of mind. I have Goods in Transit insurance upto £50k which can be increased if the item is worth more.
As well as the transportation itself, I also offer a wrapping service. Any item will be very well protected.