They will be leaving Bognor Pier at 10pm and walking through the night/day and hope to be back at Bognor Pier around 6pm on Thursday.
Any support along the route will be appreciated (even if it means braving the rain), they will be carrying buckets for the Firefighters Charity.
You can follow the Twitter page @BognorFire for location updates along the route.
Here’s a bit of background on the reason behind the walk – in a tough year this amazing charity has continued to support and help so many in difficult times, so please donate if you can: