After a long search I actually found some braid scissors that work.

Ceramic blade scissors, that cut any braid, silk or monofilament, even worn or relaxed. The secret of these scissors lies in the combination of a notched blade that prevents the braid from skidding and a smooth counter blade that shears even a very small length of relaxed braid.

All this with one hand 

Overall length 12cm

Rounded ends for safety

Tooth blade in unalterable Japanese ceramics, close to diamond hardness

Short and thick, the blades can withstand a drop of 1 metre on to concrete

Adjustable brass pin

Sleeves reinforced with nylon

see Video link to see just how easy to use they are.

https://www.youtube.com/watch?v=WBHOIh_hdhs&feature=emb_title