SELECT T3.name ,  T3.time FROM train_station AS T1 JOIN station AS T2 ON T1.station_id  =  T2.station_id JOIN train AS T3 ON T3.train_id  =  T1.train_id WHERE T2.location  =  'London' ORDER BY T3.time DESC
Show all train names and times in stations in London in descending order by train time.
[Schema (values) (types)]: | train_station |  station : station_id (text) , name (number) , annual_entry_exit (text) , annual_interchanges (number) , total_passengers (number) , location (number) , main_services (text) , number_of_platforms (text) | train : train_id (text) , name (number) , time (text) , service (number) | train_station : train_id (text) , station_id (number);