Hey Struan,
Thanks for getting in touch - sorry to hear about your latency issues.
We'd love to offer some guidance here, but we're not currently able to view the screenshot you're attempting to post here (we're seeing a "please update your account" message from PhotoBucket instead).
If you'd like, feel free to send over your results via PingPlotter's built in share feature ("File" -> "Share"), along with any troubleshooting steps you've already attempted - and we'd be happy to take a closer look and offer our thoughts. In the meantime, we've got a *great* guide for using PingPlotter to troubleshoot connection issues, which may prove helpful to you here:
https://www.pingplotter.com/fix-your-networkIf you have any questions - please let us know!
Best wishes,
-Gary