My Brooks B17 has begun to rub me a little on the thighs, from the saddle's side side skirts flaring up and out when sitting on it.
So I punched 2 holes near the bottom edge of each skirt and put a cable tie through the holes and around the seat rails. This worked well, and it firmed up the saddle a bit.
Then yesterday while accelerating hard from a traffic light, I felt something on the saddle go <pop>. One of the cable ties had snapped! Now cable ties are very strong, so the tension from the saddle sides must be enormous.
I replaced the cable ties with thicker ones and laced them around the seat post instead of the saddle rail. This has improved the shape, pulling the side skirts down and in instead of just in.