This picture was published on NCT's facebook page yesterday.
Next week the frequencies of services 15/16 and 87/88 will be increased from every 20 minutes to every 15 minutes but these buses will replace deckers.
Premiere's Red8 to Hucknall also starts on Monday and I have seen reports that it might be operated by deckers. It is many years since double deckers ran regularly to Hucknall.
Richard