I guess its possible that 14 LUL refers to London Underground Lines. Officially there are only 12 but whoever set the question could have included the Docklands Light Railway and one other which I cant think of right now. Be interested to know what others think. I'm still trying to work out the other two!
Thankyou so much, been trying to work it out for weeks. Doing a quiz with my daughter for girlguides and have to post it within the next couple of days. Let me know if you think of the other two. Many thanks again :-)