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Trading standards officials said they were particularly worried about young people getting injections, because finding practitioners who checked for the minimum age of 18 was a "postcode lottery".

He said "schools face shortages of experts like educational psychologists and speech and language therapists, and a postcode lottery in accessing additional money from cash-strapped local authorities for pupils with the greatest needs - while parents are having to take councils to tribunal to get the places they want for their children due to a lack of capacity".

Ms Hunter hoped the book would "highlight the postcode lottery" that determined the care that women received.

The domestic abuse commissioner, Dame Nicole Jacobs, said target hardening was a "postcode lottery", and some victims were being "driven into homelessness" because it was becoming "too dangerous" to stay in their homes.

Meanwhile, Luke Bodset from the AA said the problem was a "long-running gripe" with motorists known in the industry as the "pump-price postcode lottery".