Overhead Gatwick via the active threshold is still possible and will be given as well as any other transit.
Overhead LCY in a single is contentious particularly if going up the Lea Valley. I regularly use to go that way in a single but tend to only do so in a twin these days, not that IMHO I really had any reservations about doing so in a single as long as you are prepared to get your feet wet if the worse comes to the worse.