I've been messing around with a new app " photo shop touch " some of which has enabled me to colourise old black and white shots of the Lynton line and also lately to add photographs together. It's a very simple and easy to use app and within a few minutes quite nice results are possible.
Heres a photo shop of Lew in Lynton using this app. Now I'm of course no expert in this but can share that the approach I've used is to use very subtle toning so as not to be too vivid in the colours. I'm quite pleased with the results so far and it's quite an enjoyable way to spend a half hour bringing to life these old photographs .