Edit: 4508 is on 9/27A as changeover for 1915, 4509 spare in Middlesbrough
Edit2: 4509 replaced 4069 on 17B at 1120
Edit3: 4069 has gone back on the 17B board at 1320
Edit4: 4509 replaced 1494 on 9/27A at some point in the afternoon
![Wink Wink](https://northeastbuses.co.uk/images/smilies/wink.png)
Also, 1739 on X3/X3A