Lawrence - sorry to hear that. Hope it recovers enough, but you probably should think again if not.
Just got back from a steady ish 4 miles. Didn't look at my gps until I finished and then found it was mara pace!
I would be really encouraged although I'm getting frustrated and annoyed at a persistant tickly throat following last week's cold. However, I'm off work tomorrow and planning 2 days of complete rest. Hopefully this will help it to finally clear as with the predicted weather I would be hoping for a pb, but would have to adjust my expectations if it doesn't clear.