I looked this out in an old sketchbook as it fits with the current series. It was done in 1995 with a Rotring pen.
I don't use pen and ink very often as I find it too scratchy for me - I like pencil or charcoal better as I can get areas of tone down in a way I like better, I usually used water with these Rotring pen sketches to create washes, but only used a very little on this one. I really like other peoples pen sketches but just don't enjoy doing them myself as much as other media.
I want to go back here and sketch again. It's on the canal in the city. The old factory buildings and higgledy piggledy roofs and building shapes probably won't be there much longer as the area is being redeveloped. Such a shame - I expect it will be more ticky tacky boxes, looking as though they were made from lego :( ...... and all the same.