Lots of potential
Live map routing did not work any of the times I tried it. I would have to copy address to the iPhones map application (which worked fine each time).
List of attractions did not include the Beatles Abbey Road. App includes a great feature to suggest attractions that are missing, but it requires you to locate it (which I could not) so I was unable to suggest it.
App should be great in the future if they keep working on it.
UnableToImpressWife about
London Travel Guide (with Offline Maps) - mTrip, v1.2.3