As I was sitting on the tube yesterday, looking at the tube map, I was working out how many of the tube lines i have actually used. I thought I had been on all of them, including the DLR, until I realised I haven't yet been on the East London line as i've never had much call to go between New Cross and Whitechapel.
So, it's 12 out of 13 for me, but then again I've had nearly 40 years in London to do that. So, how many have you actually used, either living and working in London or just as a tourist.
In case you need reminding of the tube lines, they are - Bakerloo, Central, Circle, District, East London, Hammersmith & City, Jubilee, Metropolitan, Northern, Piccadilly, Victoria, Waterllo & City and the Docklands Light Railway (DLR). If you need reminding where they go, heres a link to a tube map - www.tfl.gov.uk/tfl/pdfdocs/colourmap.pdf.