If you can defer the link is here:-
http://www.virginlondonmarathonballot.com/withdraw/
Can be done up to 5pm on race day, more info here:-
http://www.virginlondonmarathon.com/marathon-centre/enter-virgin-london-marathon/deferred-entries-due-illness-or-injury/
When you say you have a club place, in my club you can't defer to next year, you have to pass your place on to another club member
Just saw a thread from last year dated 29th Sept, so could be late Sept or early Oct?
No, you usually get a postie saying they are in the sorting office at some point, but I would say in the first week of the month
Not long to wait to see who is in and who is out, roll on early October