I'm currently on a train heading into London Paddington station, from where I'll be making my way over to London City Airport. All being well, I should have plenty of time, but the train company I'm travelling with doesn't have the best on-time statistics, and there's apparently a problem with one of the engines on the train, so I might need a mad dash on arrival...
The Transport for London journey planner suggest taking the Bakerloo line from Paddington, cross-platform change to the Jubilee line at Baker Street, then onto the DLR at Canning Town. Platform to Platform times look to be 40-45 minutes, so probably about 60 minutes mainline train to airport.
Is it possible to do the journey faster though? My hunch is that mid-morning, a taxi the whole way would potentially take longer due to traffic. Likely to be correct? How about something like Bakerloo+Jubilee out too east London, then taxi from there? Or perhaps run from Paddington to Lancaster Gate, Central line from there out east, and a taxi for the last part?