Welcome to the Paramotor Club
I think in the entire UK that there are only 1 or two Bullix trikes. There is one guy somewhere in Scotland who may see this post, and another who is down in Devon and will almost certainly not see this post.
Regarding the law, the Bullix trike is also too heavy to fit into the 70KG max weight we are allowed in the UK (the main reason there are only a couple here I guess)
Sorry if that's not what you wanted to hear.
If you wanted to foot launch, I am sure there will be more offers
SW