It's the most boring livery they could have come up with, and not exactly an original design but perhaps they weren't go in for a originality.

It creates somewhat of a Mandela effect, it's so generic that I couldn't 100% guarantee that they didn't already look like that.

Given that renationalisation is a bit of a hot button topic for the right wing, they probably didn't want to rock the boat too much. This doesn't particularly draw attention to itself.