Repainting that huge footbridge would cost many thousands of pounds I am certain of it, particularly as they probably wouldn't allow them to use ladders and they'd have to paint the bits over the track at night when there were no trains > lighting towers and higher rates of pay for unsocial hours.... And that'd just be for slapping a new coat of paint on it, we all know if one is going to do the job properly it'd need wire brushing and/or sand blasting first, then under coating (and only then painting) which would cost tens of thousands (probably a hundred thousand plus for sand blasting as well ?).