Prep for travel to London

My wife & I are leaving for London in one week! We will be there for two weeks and are lucky enough to have tickets to some Olympic events. In addition to spending time in London, we will visit a friend in Hastings, and also go to Ramsgate to see the vacation home my sister-in-law recently purchased. Since the trip will be quite busy, I don't believe I will have a lot of time to paint, so I'm not taking my pochade box with my acrylic paints. Instead, I will take ink pens & my travel watercolor box. I have been practicing a quick way of sketching which I will use on this trip. First, I use a black gel pen (water soluble) and sketch the scene. Afterwards, I use a watercolor brush to add water and create a black/white/gray image. Finally, I go back and add just one or two (or, as in this case, three) watercolor washes  just to add a bit of color. As long as I get the first step done on location, I can finish the sketch at a later time, which will work well while traveling.
This building is a local bar called George's Hideaway; the structure used to be a train depot. Over the years, the building has settled and now appears totally crooked.