Hi all - I am training for the Royal Parks HM in London in October. I have had a similar problem to MissWobble in falling behind with my training programme. I am doing the Zenlabs HM one, which gives you things to do (running or cross-training) almost every day. On the good side, it helps to have that structure; on the bad side you do worry when you slip behind. I was doing fine for the first month (last month), but last week life got in the way, big-time, and now I'm a week behind.
I went out running yesterday, though, and actually found it easier than when I was running every other day! I did 10K run-walk, in just over 1 hr 15 mins - the same time that I took to do 10K all-running last year.