I have not received anything yet but will post here when I do. I would not worry at this point, as I was not expecting any notification until early October.
Some of my friends run a marathon and just carry on! I always have a post marathon hangover and lose a bit of fitness. After all the hard work training, I think it is natural to want to ease up to some degree. I ditch my watch for a time and enjoy some lovely runs in the countryside. I always start to enjoy it all again!