be aware of spray reducing your vision
The usual two second time gap will increase to four seconds when the roads are wet. If you stay well back you’ll be able to see past the vehicle, be out of the spray thrown up by the lorry’s tyres, give yourself more time to stop if the need arises, and increase your chances of being seen by the lorry driver.
B allow at least a two-second gap
C move left and drive on the hard shoulder
D move right and stay in the right-hand lane