The Highway Code does not need updating, and probably never will.
It just needs adhering to.
"Use cycle routes, advanced stop lines, cycle boxes and toucan crossings unless at the time it is unsafe to do so."
"You should wear a cycle helmet "
"
Zebra crossings. Give traffic plenty of time to see you and to stop before you start to cross. Vehicles will need more time when the road is slippery. Wait until traffic has stopped from both directions or the road is clear before crossing. Remember that traffic does not have to stop until someone has moved onto the crossing." (In other words, don't set foot in the crossing until the traffic has stopped even though it need not stop until you have set foot on the crossing)