Whereabouts in Holborn Mike? I used to work in New Fetter Lane many moons ago and would get the train to Holborn Viaduct (now sadly no more), after that closed it was a pleasant stroll from Blackfriars, along Farringdon Road, up Fleet Street, cut through the alley past the Cheshire Cheese and Doctor Johnson's house, then past The Cartoonist, then up around the bend and Bob's yet uncle. Oh Happy days! I'm in Canary Wharf now, which is completely souless and vile. Full of suits, shoppers and security guards. I'd get the bus up Dog Kennel Hill if I were you, then a train from Denmark Hill and if you can't be doing with Peckham Rye do as Brendan suggested.