I'm also looking for a Jet A-1 Highway Bowser (sub-1000 litres).
Found exactly what I wanted with all the right options - brand new, water and particulate filters, double skinned, fast flow, 12m hose, etc, etc.
Single axle version of this:
Abbi 10ART Transportable Fuel Storage Tank | Western Global UK
All ready to go, then told it's not approved for Jet A-1 - just red or white Diesel
Is there are distinction for private use? Any recommendations?