Is this considered a random/probability sample? a company that conducts face to face surveys have described their sampling procedure as follows:

We use a unique and rigorous sampling method - a form of random
  location sampling, using a control method applied to field region and
  sub-region over a robust number of sample points (typically 170-180)
  to ensure we get a good geographical spread. We then set our
  interviewer quotas for gender, age, working status and tenure to
  ensure our sample is nationally representative - we use the CACI ACORN
  geo-demographic system in the selection process.

Would this be a random or a probability sample? Or is it a non-probability quota sample? Or a combination of both? (is that possible?)
 A: I disagree with @DJohnson -- this does not look like a probability sample -- simply because the probabilities of selection are not quantifiable for quota samples. The phrasing "unique and rigorous" is another obvious smell. Face-to-face surveys can be designed using the established sampling techniques (e.g., Kish's classic sampling book) based on the reliable ONS data, without the need to come up with anything "unique". In these samples, interviewers are instructed by the sampling statistician who to interview, rather than allowed to pick up somebody from the crowd (which is what quota sampling by location would eventually end up being) -- and the interviewers will probably pick up the easier-to-interview cases that way, biasing the sample.
That does not mean that the ultimate sample is awful. It may be reasonably close to the target population on demographics, so whatever is closely related to demographics may work out OK. But many behaviors are rather poorly explained by demographics, and nonprobability samples often have a poor record of tracking behaviors. Then again, for marketing purposes you may not need the fully rigorous sample if all you need is to figure out what audience your product should target.
For more information, you can check out the following reports by the American Association for Public Opinion Research, the leading professional society that deals with issues of survey methodology:


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*Task Force on Non-probability Samples (2013) -- of which quota sampling is an example.

*Task Force on Evaluating Survey Quality (2016) -- checklist of questions that a consumer of survey data should be asking.

