broonie27:
On the download speed front something has changed since yesterday, when connected to the Vodafone router I am now getting ~700 Mb/s download so that's good but when connected via the EdgeRouter I'm since only getting 275 Mb/s.
The Vodafone routers can handle Gigabit connections totally fine. Like I say, you're better to just turn its WiFi off and just use that over the Edgerouter as it is apparent you're not doing anything complex. I don't personally have any Edgerouters out there in the field anymore but in my past configuration never had any issues with Vodafone Cable.
There shouldn't be any need to reconfigure the Edgerouter every time you reboot anything (this is silly) but if you're really keen to stick with the Edgerouter you're better to investigate the logs to find out why it is doing that, and see if you get the same behavior with the Vodafone router.
Sorry I don't have any other recommendations - I don't personally run an Edgerouter anymore as many of us have moved on from this platform.
Also, how are you testing? Where are you getting these speeds from?