不是吧,一下飞机就去大使馆?
地址:
http://www.chinese-embassy.org.uk/chn/lsyw/qz/t282101.htm
最便宜的应该是公交。最方便的应该是地铁:
http://journeyplanner.tfl.gov.uk/user/XSLT_TRIP_REQUEST2?language=zh-cmn&sessionID=JP01_458413718&requestID=2&tripSelector5=1&itdLPxx_view=detail&tripSelection=on&command=nop&calculateDistance=1