More than 250 people in the queue to see the Queen lying in state at Westminster Hall needed medical support on Saturday, St John Ambulance has said.

It comes, as the charity alongside the London Ambulance Service is providing medical support to the crowds gathering to pay their respects after the death of the monarch.

Across all the “ceremonial areas” in London, over 403 people needed medical support on Saturday, with 19 people taken to hospital.

The medical numbers came as St John expressed concern about cold temperatures overnight as people queue alongside the River Thames.

Our wonderful volunteers have been working non-stop so people can pay their respects safely.

We’ve had volunteers of all ages, including amazing youth volunteers and even a dog!

Our volunteers use their lifesaving skills at significant events. Read more: https://t.co/RneixWXOQ8 pic.twitter.com/8PZ0Cq3Dvg

— St John Ambulance (@stjohnambulance) September 18, 2022

Those waiting in line overnight on Friday and early Saturday morning faced temperatures dropping to as low as 4C.

In the early morning on Sunday, St John said some 98 people needed medical support, nine of whom needed to be taken to the hospital.

Thousands of volunteers for the charity have offered their support during the national period of mourning.

It is helping to provide medical cover in Windsor and London where thousands have gathered each day since the Queen died.

Hundreds of mourners in the crowds have needed medical support so far.

Around 1,000 St John Ambulance volunteers will be on duty during the state funeral in London and Windsor, including 800 who will be on hand to provide medical and first aid support.