A great build as usual Mike.
Your 'suite' of buildings on your layout really make that 'northern town' atmosphere with the style of lintel, type of brick and general ambience.
I have used the tomato puree tube trick for flashing as it also goes a nice shade of oxidised lead after some time.
I first tried 'silver' gaffer tape but although it did look okay at first, it tended to curl away from the wall/roof after a couple of years as the tape adhesive dried out. Real metal is a much better solution.
