Just spent a few days in Devon and had a day on Dartmoor, what a fabulous place for photographers! This shot was taken with a Panasonic GH5 fitted with the Leica 12-60mm lens set at 12mm (24mm equiv. on a full frame camera). The picture was shot in full colour and converted to B/W in Photoshop with the Silver Efex Pro 2 filter. The beauty of digital photography is that you can manipulate the photograph at any stage after taking it. Most digital cameras do have a B/W shooting option, avoid using this as you will have far more control in your editing application.
Absolutely stunning image, Vincent. I also just straight out avoid using B/W option for the very reason you mentioned. It's just unnecessary, and even harmful in the post processing stage.
The beauty of shooting colour and processing to B/W at a later stage is that you can apply any of the traditional photographic filters to the image, i.e. Yellow, Red, Orange, Green, Blue etc. and achieve the same effect as if they were glass filters. The only exception is a Polarising filter, although the colouring can be achieved, the glare removal can't.