We are taking full advantage of being in London for the holidays. Last year I got back here Dec. 23 after spending a month in California over Thanksgiving.    There was no time to experience all the things the city offered, so we are trying to do a lot this time. Last night, we saw a live orchestra play the soundtrack for The Muppet Christmas Carol  (starring Michael Caine as Ebeneezer Scrooge) as the movie played on a screen above it. The audience, made up mostly of adults, was enthusiastic and gave the musicians a standing ovation at the end. The night before, we toured a light show at a wetland park in our village, Barnes. Matt has a surprise set for me tomorrow. We got a live Christmas tree, instead of the slightly massacred fake one we found in a closet in our former flat in Islington. That one I decorated with a few ornaments representing England, including a crown, bobbies (police), a red double-decker bus and a Big Ben clock tower.   I added a  few ...