(31 Mar 2023, 8:54 pm)Unber43 wrote There should always be 2-3 spare deckers at Deptford, more on weekends
Each depot has operational spares, believe most big companies aim at somewhere between 10-15% per depot. But these vehicles are to allow for routine maintenance, breakdown cover etc.
To ensure that there are always 2 deckers totally free to help with the 56, you'd need 2 dedicated spares that aren't going to go and cover breakdowns etc, so you'd need to increase the spare percentage at the depot which is a pretty significant increase in running cost.