For those among us who own their own planes, or have a supportive boss, consider APRS tracking.
It's basically a "poor-mans ADS-B" that anyone can use on anything (boat, plane, your wife's car), transmitting on 144 Mhz. The signal is picked up by volunteer Igates and uploaded to the interweb so anyone can track your progress at any time.
It's fairly popular with the RV crowd (the flying one!) in the US and available here too, for the cost of a licence and $200 worth of hardware.
For safety of life activity I don't think relying on something requiring the user to hold an amateur (ham) radio licence is quite appropriate.
Also the licence does not permit activity in any way commercial, and whether or not APRS movements are recorded for historical retrieval and analysis (like RADAR/SSR/ADS-B, audio recordings, flight plans etc.) is another matter.