I completed this one yesterday, no problems. It was tough at first but I got into it and kept going and persevering until the end.
I have found though that afterwards for quite a while I could really feel it in my legs and they were aching quite a bit. I'm wondering if this is normal after a longer run without walks in between as I have never had this before or if it's because I didn't warm up enough on the 5 minute walk as it was freezing.