The pub takes its name from the Royal Marylebone Volunteers formed during the Napoleonic wars when invasion was threatened. Now a large single bar pub, the building dating from around 1815. Last refurbed in 2023 it has a modern, open-plan layout with mixed seating and tables; four handpumps generally offer three ales and a cider. The food menu includes Sunday roasts. Adjacent to the very touristy 221B Baker Street but probably not for true Holmes aficionados. The pub can be very busy with a generally young crowd that can spill out onto the street. Prices reflect the tourist location.