I actually went out for a cycle and a run this morning. The cycle was a necessity as I had to get something in for breakfast but the running was by choice.
I went out and did 2k in 10:20 which is quite respectable for the first real run in a long long time. I had a small twinge in my knee for maybe 30 seconds but it soon passed and I've had no reaction since.
I think I will try 3k on Monday or more likely Tuesday.