ROYAL Mail has advised staff to return post in Herefordshire due to the extreme heat.

The national postal service has told staff to temporarily return to the office with post if temperatures rise too much in the areas they are delivering.

An email was sent to some customers in Herefordshire warning them of possible disruption to deliveries on Tuesday.

The firm said it did not want staff falling ill because of the heat.

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A Royal Mail spokesman said: "The Met Office has issued a red weather warning for Monday, July 18 and Tuesday, July 19.

"Customers should be advised that whilst we will do everything we can to keep services running during this exceptional weather, there may be areas where there is some disruption to their regular service.

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"In areas where temperatures rise to potentially dangerous levels during the day, our staff have been advised to return to the office with mail they have been unable to deliver and not put themselves under any risk of falling ill due to the extreme heat.

"We are working with our unions to ensure the safety of all of our staff during this time."