This evening saw First Eastern Counties Volvo B12M/Plaxton Paragon 20514 WV02EUP returning to Great Yarmouth's Caister Road depot with the assistance of an ASW Recovery Services' vehicle.
As 20514 was driven into the garage it appears that the problem wasn't too serious.
Regarding Volvo B7TL/ALX400 activity, 30886 W741DWX has returned to Lowestoft from the paint shops in the refreshed livery whilst 30901 W756DWX is expected to leave Caister Road soon for similar treatment. Sister 30900 W774DWX will be the next to follow.
My thanks to Grahame Bessey for the report and photograph.