Is any packet loss acceptible?

Recently switched to Zen 900Mbit over Openreach and set up the BQM. Pretty much every day has some amount of packet loss:

https://www.thinkbroadband.com/broadband/monitoring/...

https://www.thinkbroadband.com/broadband/monitoring/...

Is this within acceptable norms or is there a problem I should be tracking down?

Router is a Ubiquiti UDR7

Probably way outside your network and a little worse than I am used to seeing. I personally see a small red blip every few days ...

Have you looked at the Ubiquiti dashboard to see it that shows corresponding packet losses? - You can only see the previous 24 hours but that should be enough.

On a well behaved / configured FTTP connection you should be seeing zero packet loss at any time.

Daily packet loss suggests you have a fault.

The Unifi built in graphs show no packet loss that I've seen... Wonder if I should set BQM up to a PC instead and see if its the router itself not responding occasionally...

Can you swap with another router for 24/48 hours to check?

From the BQM graphs showing small blips along with nothing on their Ubiquiti, to me, it suggests that the issue is not local but at a node somewhere remote.

This is my BQM... it consistently has a little packet loss. In my case it is caused by my router.
When I first saw it I wondered what was wrong, but I tried three different router: the ISP's router, an old TP-Link and a Synology. I only get dropped packets with the Synology router, I suspect it's because the router is doing a number of things like media server, QoS, firewall etc and doesn't have responding to a ping as a high priority... I am happy with the Synology router, want it's extra capabilities and can detect no problems when using the internet so I don't think the packet loss in my router is an issue....

Yes. The simplest way to rule out your own equipment, is to swap it for something else for a day or two and see if it changes matters.

If the packet loss is caused by your own router (for example just deprioritising ICMP packets or something else) and you’re otherwise happy with the performance then no more to be done.

If the packet loss however is external, then that is another matter entirely. Can typically be a transient / temporary issue along the path between TBB and you or can be permanent issue that may be consistent or indeed worsen over time, if something is slowly failing or congested.

Understanding BQM needs to be taken in context.