Tried using the tube at the weekend recently? It's not easy. London Underground keep shutting down large chunks of the underground network every weekend 'due to planned engineering works', and every weekend it's a different selection of track. What may look like a simple journey across town can become a nightmare diversionary trek via rail replacement bus services once various line segments have been erased from service. Particularly badly hit at the moment are the Metropolitan and Jubilee lines in the Wembley Park area, and the District and Circle lines across the centre of town. I know that all these engineering works have to take place sometime, and that the network may even be better once they're all completed, but I'm sure we never used to have quite so many simultaneously.
To help the struggling London traveller, the tube website now kindly lists all the planned network closures for the next six months (all 135 of them). It's a rather scary list, so I've decided to summarise it in this easy-to-swallow table of weekend tube shutdowns. Every coloured blob indicates a weekend shutdown along part (or all) of a particular line. Now you can plan to be elsewhere as required (or maybe stick to the East London and Piccadilly lines, just to be on the safe side).