I downloaded the photo editing software GIMP a couple of evenings ago and am getting used to it after a frustrating start. The software’s open source and doesn’t cost a thing. Personally, I think it has some powerful features, in particularly those to do with manipulating colour.
Originally, I took the photo below in automatic mode last year (although I never use automatic now). Using GIMP, I went into Color Channels and selected Monochrome. With the first photo, I brought the black and white image, chose colorize and altered the hue and saturation.
Queen’s Wood, North London