Memories of Manchester

Many years ago, I worked at an animation studio in Manchester. It was January, the working hours were long and what I saw of Manchester was mostly darkness: 

I stayed in a big, gloomy house that I never once saw in the daylight. 

In the morning, I'd walk to work in the dark. Occasionally, there would be a bus. 

I think the buses were meant to say 'Sorry not in service', but instead, all they displayed was a big SORRY.

What were they feeling guilty for? What could they have done wrong that they needed to apologize for again and again? It was like a public transport equivalent of the plane pulling a banner. 

Whatever they did, it must have been terrible.