Interesting thread.
Not too many uncontrolled airfields in UK... most have at least air/ground radio.
IME when a ground station is not operating (at weekends on some fields) pilots use the published frequency to brief each other. Those in the circuit listening out and passing r/w & wx info to those arriving. The French have more uncontrolled fields and have long used their unicom/safetycom of 123.5 in a similar way. (prefixing calls with " ---- airfield traffic" to avoid confusion)
Pity we don't seem to make the same proper use of our safetycom in the UK.
As for those idiots who continue to fly in UK without radio
