Okay - let's recap. Last weekend I produced his ink sketch of Maida Vale Tube Station in London: -

Maida Vale tube pen and ink sketch

I liked this as a sketch so much that I did consider just leaving it as it is. However, having thought about it I decided that I'd always intended to apply watercolour to it, and so I did this last night. Here's the result: -

Maida Vale tube line and wash picture

On reflection I think I probably made the right decision. I think it's the most successful line and wash picture I've done so far.