This article is from the Theatre FAQ, by aku@leland.Stanford.EDU (Andrew Chia-Tso Ku) with numerous contributions by others.
The West End corresponds closely to Broadway; it is the home of big,
commercial theatre. Like Broadway, it is dominated by large, long
running musicals such as LES MIZ, PHANTOM OF THE OPERA, MISS SAIGON,
CATS, etc.. And like Broadway, critics keep writing its obituary, but
you can still find quality theatre here, often revivals of classic
plays (Shaw, Wilde, etc.) with top British actors (familiar to American
audiences from Masterpiece Theatre), or transfers from the Fringe or
the RSC or RNT. Prices are comparable to Broadway, or perhaps a bit
cheaper depending upon the current exchange rate; top prices range from
almost 30 pounds for the big musicals down to around 20-25 pounds for
plays, but you can pay much less if you aren't choosy about where you
sit.
 
Continue to: