Mr E said on a Facebook post that "At the moment it’s two for Leicester, two for Potteries and one for Worcester. Five for South Yorkshire are due to be started at Thornton’s of Ashington the week after next."
Here is link to the picture shared my Nigel of two examples parked up at what looks like Leicesters depot. https://www.facebook.com/photo?fbid=121 ... 2567578502