Media playback is unsupported on your device Media caption "Your CV is your shop window" - says Director of the National Careers Service Joe Billington

Jobseekers are hurting their chances of securing new employment by not spending enough time on their CV, according to a survey.

The most common mistake is sending a general CV to employers, rather than tailoring it to a specific role, according to research by the National Careers Service.

Two thirds of careers advisers said this stopped people securing new jobs.

More than 60% of advisers said spelling mistakes were a common error.

CV howlers A 17 page CV including every detail from when the applicant was born

Use of wording that the person whose CV it was did not understand because he had paid a firm to produce the CV for him

Using an inappropriate email address e.g. iamgreat@

A CV typed entirely in capital letters

A company name spelt incorrectly throughout the CV

Joe Billington, director of the National Careers Service, said: "People know they are making mistakes, but they are not spending enough time on making sure their CV is fit for purpose."

"A CV is an applicant's shop window. With the right advice and support anyone can turn their CV from a careers void into a careers victory."

Most careers advisers believe people should spend an hour a week working on their CV, but fewer than a third of jobseekers agree.

Examples of the types of mistakes encountered by advisers for the National Careers Service include a 17-page CV, a CV typed entirely in capital letters, and the name of the applicant's current employer spelt incorrectly throughout.

The report was based on polls of almost 200 careers advisers from the National Careers Service and over 2,000 jobseekers.

The National Careers Service, which provides information and advice on learning, training and work opportunities, says jobseekers should follow some basic steps to improve their CVs: