In gliding, for the Silver Badge a solo cross-country to a point 50 km away from the launch release is required. For the UK CAA SPL (SailplanePilots Licence) also a 50 km flight if solo, or 100 km if dual. (27 or 55 nm.).

And, having just started teaching them myself, the UK and EASA Night Qualifications require a 27nm night cross country of at-least an hour. Which is a very very slow 27nm !

G

Not quite. The requirement is “ ….including at least 1 hour of cross-country navigation with at least one dual cross-country flight of at least 50 km (27 NM)” So 18ish minutes of dual x-country in the average GA training aircraft to cover 27NM. The rest could be solo or a separate night local famil.

Indeed. Personally I've actually been delivering it as a slightly longer X-country of at least an hour with regular en-route simulated emergencies.

G