Just an advanced warning that the above will close at 8pm Saturday and is due to re open Sunday at noon (though could be later if there are problems!). Closure is for demolition of the old J12 bridge. (Toddington services will be closed too and I'll be working on the service roads there...lucky me!). If this affects you (esp. if heading to Luton airport) allow at least an hour extra time and plan a route not using the A5, which is the official diversion.
Bugger, I'm going to Nottingham sunday morning. I took a peek at the Highways Agency but it only mentions 29th and 30th June 10pm til 8am lane closures around J19. No mention of J11-13. Sods