Moorland Woodcock in the Southern Uplands

I was walking across moors in the Southern Uplands of Scotland yesterday at about midday and flushed at least three woodcock from the grass at about five minute intervals. I was at an altitude of about 400m and some low cloud had rolled in and visibility was about 100m. I would describe the habitat as heavily grazed rush heath / grassland (NVC U6 perhaps), with some sphagnum and other moss, but mainly tussocky grass and heath rush. There was no heather and the nearest wood was about a mile away and even that was not ideal for woodcock being a closely planted conifer plantation with no understorey. I've never seen woodcock in this type of moorland habitat before or at such a high altitude. I know that they sometimes leave woodland at night to feed in adjacent fields but these birds gave the impression that they were here all day.