Arriva North West - Green Lane Depot

[Valandil]

RE: Arriva North West - Green Lane Depot
3159 (I think) had to be taken off the 7's last night due to problems with air pressure ... it often wouldn't get going again after stopping and going over speed bumps was a nightmare!
It was replaced with 3055 at Huyton on the way to Warrington.

An Enviro leaving Queen Square last night had 't92010106' scrolling on its rear display, alternating with 'poll'.
Anyone know what that's about? Guessing it's just a malfunction.
I assume it was one of Green Lane's but it may not have been as I didn't see the fleet or service number.