4991 has been withdrawn since January,

Having incurred defects uneconomical to repair, this vehicle has been withdrawn from service at Deptford Depot. Originally intended to be retained and re-allocated to service 35 (Low Moorsley - Boldon Cinema) in line with service changes effective 28th January 2018 due to having exhaust modifications undertaken bringing the service up to a 'Euro 5' engine rating, the Eminox SCRT exhaust will be transferred to Scania L94UB/Wright Solar 5202 (NK54 NUV).


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Is it not time for someone to investigate these fires?, isn't this the 4th one in so many months?