[Twotwo]

I have been looking online re getting some type of gate to fit wth my lightweight hurdles, the options seem to be -
Hurdle with 1/3 gate in it
Guillotine type
Swing type
Shedding type( but probably too expensive)

I don't mind if I have to tie it to the hurdles but would rather it wasn't too heavy as I like to be able to move the hurdles/ pens to the sheep.

I just want something so I can easily separate sheep into field or pen.

At the moment I can only afford one.

Your ideas on what's most useful

[Marches Farmer]

I have a two-way shedding gate from Modulamb.  Works very well and there are plenty of other styles out there.  Not lightweight though.

[pharnorth]

Shedding gate is probably the most versatile if you can only afford one.

[Slimjim]

Cut a 4' or 5' hurdle in half vertically down the 'spike' side of the central vertical rod and use the half with the loops as a gate that will swing on an adjacent hurdle's spikes. Alternatively use them loop to loop and put a metal pin down both sets of loops. It works.