Glad you sorted it - strange how things go 'bump in the night'.
Here's some info concerning the echo's and BBC sounds. The BBC changed from using the Alexa app 'tunein' to their own app called 'BBC sounds' to listen to their radio stations and what not. On the 'show' all seems well and good if you listen to BBC 1, 2, 3, 4, etc., but try and listen to BBC radio 6 music is haphazard, to say the least.
What happens is radio 6 music will just stop after 2, 6, 9, 10... hours - totally random - some days it will work OK for a day or two, other times it just plays up. Sometimes just issuing a 'alexa continue' will get it going again, but with a start-up delay of anywhere between 5 to 30 seconds. Other times it will just stop and self start after a minute (totally random). Other times it will just stop and alexa just seems to close it and go back to the home screen - some days no matter what you do it just would not play at all.
A google reveals posts from the BBC acknowledging the issue and states they are working with Amazon to try to resolve the issue.
*** March 2023 *** We are still continuing our investigations with Amazon on why BBC Sounds streams sometimes stop or cut out on some Alexa devices. We will update this page once we have more information. In the meantime, the steps on our troubleshooting page may help: Help fixing problems...
www.bbc.co.uk
Ummm.
Anyway, after my many years on the Internet I remembered an issue I had when moving up from a 33.6 Kbs to a 56.0 V92 modem - some web pages wouldn't load, some would load partially, some would load but links etc. on it didn't work at all. The same with the infestation mess 'real player' - some streaming music (not a lot in those days) wouldn't work, some did. Eventually I found ou the issue - MTU value. I dropped it (can't remember what to now) and finally found a lower value where everything worked.
So, I looked at this on my FTTC connection. After trying several values (1474, 1452, etc,) I tried a value of 1430 that I used to use when I first got 512Kb ADSL1.
*BINGO*. Since then, BBC radio 6 music connects and plays immediately, never stops/cuts out and just plays - for over 5 weeks now with no issues. I changed the MTU back up to 1452 and the old issues returned. So that was that. I changed my WAN MTU to 1430, added the dhcp option 26, 1430 to dnmasq (using Merlins firmware here) so all my devices get it too, and all works well,
In fact, my home network is a lot faster, and the Internet is faster to respond to DNS and load pages. A big improvement all round.
BTW, I am in England using an Asus N66U (Merlin) with an FTTC 80/20 connection on BT's network with City fibre reseller Aquiss ISP.