What Insect Has A Black Body 6 Orange Legs 1inch Long Looks Like A Wasp?

I live in south wales UK and saw something the same as you described earlier today.. It had a body shamed similar to an Ant like 2 separate parts jet black with orange legs.
I have never seen anything like it in this country before? Been looking it up for aver an hour but still haven't quite found any result?

I also live in south wales uk and have seen a few around the house

We saw exactly the same thing in our green house and decided to look it up as it was so freaky!
We think it could be a sirex wood wasp. The only problem is they are from South America, New Zealand and Australia. Hope this helps!