This week's strikes, if they go ahead, need to be understood in the wider political context. Certain unions have always been opposed to the Tube Public Private Partnership (PPP) contracts, of which Tube Lines is one, the now defunct Metronet, being the second, now run by London Underground. This is despite the massive extra investment it is delivering for improvements to the creaking Underground network. After years of underinvestment, from successive governments of both political persuasions, there is now funding for improvements which we can feel, and will continue to feel, in the coming years. The addition of the seventh carriage on Jubilee line trains is a case in point.