Dangerous goods advice- UK regs and ADR

I have not long passed my adr packages and yes i probably should know this but you get taught 1 way and then people tell you something different so here we go tryed to find in my book
when i collect a load of hazardous goods “container driver by the way”
{1} Do i sign the dgn when i am takeing the container to be loaded on the train ?
{2} Do i sign the dgn when i am takeing it straight to the dock to be put on a ship?
{3} Do i never have to sign a dgn ?
{4} should i always sign the dgn?

Rather seem like a fool now than when i get stopped
Cheer’s in advance