On the Nash trailers and lets say the 17K, a sideways bed against a wall makes for inconvenience when someone has to crawl over the other to get in/out of bed.
As the 25C has a bed where each can get out on their own side. Mucho better!
We have a Tango 23, which has a jackknife bed/sofa.
Its a sofa that folds flat and a mattress then lays over the top for comfy sleeping. We each can get out our own side.
The jackknife set up helps for a shorter over all trailer. FWIW
The Hornby trailer looks good, and much like the Micro-Litr Cargo Extreme I am getting.