Interesting photo listed for sale on ebay - Sunderland Busways fleetline 826 with Griersons, presumably shortly after arrival - wearing a mixed livery and strangely carrying panel from 821 which must have been swapped after withdrawal of 826 in Sunderland.

https://www.ebay.co.uk/itm/136651430132?...busways%22&itmmeta=01K8C0WDFP3G61YXKXS83X9X3Z&hash=item1fd10f58f4:g:aGIAAeSwLeto--HJ&itmprp=enc%3AAQAKAAAAwFkggFvd1GGDu0w3yXCmi1e94Hhdfo8E5Ki5jqBVa8nZWwF4S3R5OSQk%2Bru%2Bde%2BykTqbZLhJVG8SRAd2QtdxctdsRY6n55lvrVtXCeJYdDbERLiHwgv3mzR59hQIvgFlFtX%2F739QOIqnNTbD8T30xn6anxtP7r06rWcpHA6xIs6VM%2FHQu%2Bgch8bprLKQTTDpezMKGtjfLEN6zNd5ekTOmr5EvBkWlcCGL%2Bq0u9n7j6j3EH0jzkUOD%2FukocrXFRm4SQ%3D%3D%7Ctkp%3ABk9SR5jY8YDDZg