Sorry @evildudette, @dstanners, @snowingagain, @lunaCH ... I ddn't get any notification on this for whatever reason and didn't see the conversation. Just coming back to it now. Thanks for the comments. I have some friends in a similar position who have are suggesting that it might be necessary to get some form of proof of where the company is located. I'll let you know.
I currently work as an IT freelancer based in Germany. My primary client is a UK company who I have been invoicing with under VAT reverse charge supply for the last 8 months or so. From what I have read - even if there is a no-deal Brexit - this would still apply. However, I wondered if anyone could confirm that. Cheers