@urchaidh: Which gate is that? I thought at first you meant the one at Smeaton but that is a much more ornamental structure, nothing like the intimidating barrier in your picture. (The cedar visible over the 'palisade' in the background of your photo does seem to match that in the Streetview capture pic of the Smeaton gate though, so maybe it is nearby.)
I drove past the Smeaton gate about 4pm on Tuesday last week and it was wide open. But as that doesn't seem to be the gate that you're asking about, that's probably no help at all...
@cyclops: I get the impression that the horsey people from the 2 stables don't like anyone else to have access at all. Evidence their signs they have scattered around trying to restrict footpaths and trails to "Horse riders only".
I wonder if this is anything to do with the (IMO) rather dubious argument that the estate deploys to control access to the country park:
"A small percentage of the value of your purchase from the Park, Fort Douglas or Restoration Yard will count as payment for access to Dalkeith Country Park and will help to meet the cost of maintaining the Park.
...
The charge is a legal requirement and ensures we continue to comply with the Land Reform Act 2003. By charging a small access charge, we retain the right to close the Park gates, allowing us to make sure we keep the Park safe for all visitors and its residents."
The fact that a significant proportion of visitors don't spend any money at all while visiting the park would seem to me to undermine this argument somewhat. But then IANAL.
If they operate on the basis that [not] charging gives them the right to close the gates then they probably believe that it also gives them the right to control which paths and tracks are used for what.
We went to the country park a couple of weeks back and found that the bridge at the Meeting of the Waters was closed. I think that's to do with the work that ?Babcock? is currently carrying out on the overhead power lines all round the bypass, but there was nothing stating that explicitly when we got to the bridge (and no advanced warning on the approach paths, or anywhere else in the estate, or on their web site) which I think was unhelpful. I'm not sure whether, if the right of responsible access did apply they would have needed to submit a formal notice of temporary closure of the route in such circumstances, but given the lack of helpful signage on site I doubt that any formal notification was made in this instance.
Although we do enjoy an occasional visit to the country park, I always have the feeling that we're there more on sufferance than by right. I find it gives the whole place a much less welcoming atmosphere than, for example, the Penicuik House estate. (I e-mailed Penicuik House as the lockdown was starting to lift, asking whether their car park was open yet, and got a very nice replying saying yes it was, thanking us for staying away while it wasn't [unlike the unhelpful folks who parked up the verges up and down the road] and generally making me feel that we would be very welcome to start visiting again. Which we have.)