I expected that to be the conclusion, but it's not. They could spend £250m on the bridge, but they're not. And it appears to be the right answer since it wouldn't provide anywhere near £250m worth of utility. They'd spend £250m to make things worse -- right now it's an awesome cyclist/pedestrian bridge, and after spending £250m it'd be much worse for that.
That's the takeaway I had as well. Spending a quarter of a billion pounds to get more cars into a traffic choked downtown is a bad investment. Spending that money on improving public transit options would improve the quality of life far more.
to me, the argument that we can't just print more money and do both because of a fear of inflation falls flat. We can't have nice things because it might be nice?