Rules for cyclists
These rules are in addition to those in the following sections, which apply to all vehicles (except the motorway section on page 85). See also page 118 - You and your bicycle.
Crossing the road
81
Cycle-only crossings. Cycle tracks on opposite sides of the road may be linked by signalled crossings. You may ride across but you MUST NOT cross until the green cycle symbol is showing.
Law TSRGD regs 33(2) & 36(1)