Keeping older <Euro4 complaint vehicles on the Outer Circle 11 is actually quite wise as it provides fleet planners/managers somewhere to 'hide' these older buses as, the 11 keeps well away from Birmingham City Centre and the low emission zones.
Whilst the AG ones might not be frequent visitors to the City Centre, converted them to Euro6 complaint emissions might improved their resale and interest to second tier operators in their later lives, especially being single-door.
That said, some of the B7/ALX400's at PB that are regulars on the 65 and 67 seem on face value, very mechanically tired. It'll be interesting to see which ones are selected for upgrading.
Whilst the AG ones might not be frequent visitors to the City Centre, converted them to Euro6 complaint emissions might improved their resale and interest to second tier operators in their later lives, especially being single-door.
That said, some of the B7/ALX400's at PB that are regulars on the 65 and 67 seem on face value, very mechanically tired. It'll be interesting to see which ones are selected for upgrading.