Hi Seb,
My LHT is a 50cm frame which gives me about an 1''- 1.5'' standover.
I chose the LHT frame precisely because I thought it's specified top tube length would suit straight or riser bars.
This was after making comparisons with other stock touring frames available here in the UK.

I don't use drop bars, but I seem to recall reading that some people find LHT frames a bit on the long side.

To give you the rest of the details.
I'm using Thorn, 'Comfort' bars on a 110mm 17deg rise stem, with an uncut steerer tube.

Hope this helps,

Mike