Of course it is possible Wintershall are drilling the side-track at this very moment, as per Rigzone.....Operating Status : "Drilling"
Wintershall have had ample time to turn the paperwork around for commencement of the side-track.
The DTI suggested one month is the normal turn around period for a new application to re-enter and drill a side-track. They also said this could be done much sooner if the application was urgent