I did my own investigation into the irritating calls I keep getting and I was able to track down the telephone company providing the line to the company. When calling them, I spoke to "Kevin" who took my details and said he would contact the company. He confirmed the telephone number belonged to a telephone client but had to contact the company for me as the telephone company has a non-disclosure agreement and cannot tell the customer the name of the company ro their address!!!
The details of the telephone company responsible for allowing this company to spam telephones in the UK:
Company name: Lucre
Telephone number: 001-616-361-0128