Independent London merchants Charles Lea and Patrick Sandeman have built up an excellent reputation for real quality of wine and service. And what I like about them particularly is that they do all the hard work themselves. Rather than just sit back and wait for brokers, agents and importers to come and sell to them, they make much more effort than most retailers of their relatively modest size to go abroad and sniff out fine wines themselves.  The following wines were shown, categorised as below, at a tasting of their current wares in Vintners' Hall, London. (Patrick S is a Vintner.) I was extremely impressed overall, and...