"Didicoy".......
.....although these days, the pejorative; "Pikey" would seem to have universally taken it`s place.
*Which appears to have 'itinerant resident of the turnpike' as it`s etymological root). :-/
Indeed Debs, and certainly in the South East "Tinker" was a universal name for all 'travellers', although originally refering to travelling tinsmiths 
As I learned it, many moons ago...
The term “pedlar” means any hawker, pedlar, petty chapman, tinker, caster of metals, mender of chairs, or other person who, without any horse or other beast bearing or drawing burden, travels and trades on foot and goes from town to town or to other men’s houses, carrying to sell or exposing for sale any goods, wares, or merchandise, or procuring orders for goods, wares, or merchandise immediately to be delivered, or selling or offering for sale his skill in handicraft.And thats the Pedlars Act, 1871.

I always wondered what a petty chapman was, for some reason.... :-/