Over 30% of business managers in the UK did not use their full holiday entitlement. This comes as a warning to business owners, holidays are an important part of the workforces entitlement and can lead to increased productivity and happiness.The institute of Leadership and Management said that firms should make sure all staff take their full annual leave entitlement.One in 20 UK business managers has said that they have lost a week or more due to the annual allowance not being taken.It is known holidays help creating a happy and healthy workforce. When staff return from holidays they are refreshed and re invigorated which is ideal for businesses to increase productivity.