Following on from the comments earlier, I have purchased some mirror stickers from ebay for 99p, snail mail should allow me time to get the model ready for them before they arrive from China.
I also did the corrugated edging for the canal today, I had intended to use DAS clay and mould it to shape but had trouble keeping the finish as sharp as i felt was needed.
Fortunately I had some off cuts of corrugated roofing which was able to do the trick:
I had also been having trouble with my foam-board base warping, I gave the bottom a wash of cheap paint thinned with water and that seems to have cured it.