Thanks all. I was trying to avoid going down the Pi route (I have 7 of them already in the house), plus by the time you’ve bought the Pi, the SD card, a case, PSU and some cheap speakers, you’re at the £50 mark anyway.
Finding WiFi enabled speakers is a real pain although I’ve seen devices like the LG WK7 (discontinued and on sale), but was unsure of support for it within HA. I may just go down the Google Nest Mini route as they’re under £35
@Tromperie Like you, I’m not a fan of closed ecosystems, but in the case of the IKEA lamps they perform a dual function, so even if Sonos kills support for the product I can still use them as table lamps. I run a Plex server myself (also on TrueNAS) and have previously built my own media player using a Pi-DigiAMP+ so agree about audio quality. This query was me looking for a low cost solution to a 1st world problem of not wanting to get of my backside to troubleshoot an audio issue