To many smaller segments likely to break apart during game play?
Are the deep enough?
Is their enough variety in the range?
The mini trench is very nice.
These seem popular amongst gamers, longest section is 150mm which would provide a reasonable length without being broken up by several pieces being put together.
A good selection of sections blending into weapon pits and command bunkers, these could be very useful for Port Arthur and more established defences.
Would they sit too high on the table?
IT miniatures range
I couldn't find to much on the web about their Trench system, but they do have a number of command sections and bunkers to compliment the Trench lines.
These look nice, they have a early war feel as opposed to the more established lines in 1916 onwards.
But I am not aware of a UK stockist.