The new walks calendar contains two entries per Saturday, these are labelled:- SAT and SAT+ This will allow up to two walk to be submitted for each Saturday.
If you are submitting the second walk, try to keep your walk a little different from the walk that is already there for the same day. Ideally, try pairing a longer with a shorter walk, or an easy with a strenuous, or one further from London with one closer. This will provide better choice for walkers, prevent the two walks from being in competition and hopefully will encourage more people to go out walking that day.
Also, please try to fill up the regular Saturday, Sunday and Wednesday entries before using the Saturday+ entries.