It's a fairly minor complaint tonight- but i have this irrational desire to actually buy a train ticket that covers my journey. For example, it can't cope with a return journey that ends up somewhere else. Today i travelled, as i often do, from Borehamwood (zone 6) to zone 1, and home to Watford (not in a zone). I explained the situation when i started, and got sold a travelcard that clearly wouldn't cover Watford. So i'd have to buy an extension from euston. This is where it all goes wrong...