Sorry could not find your post. Get a train direct from Liverpool tomLondon Liverpool Street. Or drive to Westfield Stratford City. Think parking is£8 but need to get early. They open at 10.
One stop on the tube to Liverpool Street station. 11. Bus starts there, go upstairs. Takes you through the City,St Paul’s Bucking Palace, Horseguards, and through the Westend, right out to Chelsea for shops and lunch. Come back same way to see the lights in the dark
Kids travel free on the buses but check age. Adults just tap in an out with debit card. One fare for the whole day