Try unplugging the Beam and two Play:1s from power for a minute or two. You can also try rebooting your router and removing Alexa from the Beam under the Voice settings in the Sonos app and re-adding her.

I have deleted then numerous times and reset them unplugged then restarted my router etc, even tried putting google on it and it's the same it's as if the beam hates me lol

Have you tried removing the Sonos skill in the Alexa app and reinstalling it?

Yeah removed all the apps, but it's not just on alexa, I can go on the sonos app and use sonos tuner it will paly the odd radio station but lots will just not do anything

This probably won’t work, but it wouldn’t hurt to try:  

Go to Settings > App Preferences and tap Reset App. Then close and reopen the app and test again.

BTW, what router are you using?

We have a asus xt8 mesh system

There are many users with ASUS routers that have been having connection issues lately. Read through this thread and try the suggested solutions and see if it fixes your problem: 

I don't have qos on my router as I said they system upstairs is fine on the same system. So don't think it can be router

Here is another thread that might be helpful: 

Here is the link to previous firmware updates for your router: https://www.asus.com/us/Networking/ZenWiFi-AX-XT8/HelpDesk_BIOS/

Will try and connect it direct to virgin router tomorrow just need to turn on wifi to prove it, but seems odd it works on the one upstairs and will work if both are playing same content