What? Sushi train
Where? 76 Brewer st, W1
When? When you're busy as a bee and there's not a second to spare.
Why? Sit, select, and be seduced by the sashimi... you will be serving yourself in seconds.
I would Have? The house handroll. 'They' seem to know about it from here to New York.
Inside track? free Unlimited green tea.