I tested a variety of antennas using a NanoVNA vector network analyser and traceroute received signal levels from a Meshtastic node about 400 metres / 0.25 miles away on. Comments and suggestions are welcome. For more fun, watch my next video where I measure some "identical" antennas
There is a Facebook group which I forgot to mention is Meshtastic Brighton
The Facebook group I mentioned is Meshtastic Brighton
  / 3696312513946679  
A much larger Facebook group is Meshtastic UK
  / 625434626178266