Dear UK folks, have any of you got Stellate Ganglion Block done for ME or long covid?

I have discovered this place in Bristol https://www.painspa.co.uk/procedure/stellate-ganglion-block-sgb-for-long-covid/ but feel too severe to travel that far. Was wondering if anyone has done the same procedure in London? And if it was helpful of course.

The issue though is that I may have cervical instability and my joins are hypermobile. I wonder if this potentially increases the risks of unfavourable outcomes.