There are certain jobs in the UK which do not require any work experience. These include menial jobs, including cleaning and driving occupations. Employers want work experience of a minimum of one year in most such jobs. There are instances where employers are not inclined to waste time training employees. Obtaining work experience is possible. Instead of waiting for a job advertisement, you need to walk into the companies directly and ask for jobs.
You can try such organizations by telling them that you intend to provide your services on an experimental basis. The places where you can try are advertising agencies, hairdressers, and factories, among others.