auto_pilot off, If you don't have access to CAA CAP 493 here’s the latest wording.
9.3.4 Controllers are not to instruct aircraft or vehicles to cross illuminated red stop-bars used at runway and intermediate taxiway holding positions. The Aerodrome Operator may decide, on the grounds of safety, that inoperable stop-bars and associated taxiways be withdrawn from service and alternative routes used where practicable.
9.3.5 On the occasions when the withdrawal of inoperable stop-bars is not possible and the stop-bars cannot be readily suppressed, under exceptional circumstances, an aircraft may be instructed to cross such an illuminated stop-bar subject to the following minimum conditions:
a) The affected runway or intermediate holding position and the aircraft are visible to the controller. This requirement may be satisfied by the use of SMR/SMGCS as specified in MATS Part 2. When an aerodrome is not SMR/SMGCS equipped, local alternate solutions based on risk assessment and detailed in MATS Part 2 may be employed.
b) The phraseology used is to leave the pilot or driver in no doubt that the crossing instruction only applies to the particular inoperable stop bar. Conditional clearances shall not be used under these circumstances.
c) Additional MATS Part 2 procedures may be required where local risk assessments have identified that further mitigation measures may be necessary.
9.3.6 In all cases particular care should be taken if this contingency procedure is to be used in Low Visibility Operations or at night as the green taxiway centreline lights linked to the stop-bar will not be available.