A dozen items are banned from being taken into Westminster Hall where the Queen is lying in state for four days.
A million people are expected to file past Her Majesty's coffin before her funeral on Monday at Westminster Abbey.
Queuers young and old have braved the unpredictable September weather to line up for miles at all times of day to be able to pay their respects.
The coffin is resting on a raised platform called a catafalque, with three ceremonial units on guard in 20-minute shifts.
The queue starts where Albert Embankment meets Lambeth Bridge in Central London, on the south side of the River Thames - but plans are in place for it to stretch as far as 10 miles.
You can leave your tributes to Queen Elizabeth II here
And while members of the public have been encouraged to bring food and water, as well as suitable clothing for different conditions there are a list of items released by the Government that cannot be taken inside.
There are airport-style security checks taking place, so the forbidden items can't be smuggled in.
Below is the full list of banned items, as per guidance released by the government.
A list of the forbidden items
Bags larger than 40cm x 30cm x 20cm in size, bags or rucksacks with expandable compartments, bags or rucksacks with multiple pockets or complex openings, solid-sided bags, or bags on wheels.
Flasks or water bottles , except clear water bottles. Clear water bottles must be emptied of their contents before you enter the security search point at the Palace of Westminster.
Food and liquid of any kind. Any food or liquids must be consumed in the queue or disposed of before you enter the security search point at the Palace of Westminster.
Flowers or other tribute items (including candles, soft toys and photographs). These items cannot be taken into or left in the Palace of Westminster.
Floral tributes only should be taken to the dedicated floral tribute area in Green Park.
Sharp items , including knives, Swiss Army knives, scissors, cutlery and screwdrivers.
Personal defence equipment or any object that could be used as a weapon and/or compromise public safety, including personal defence sprays.
Paint sprays , padlocks, chains, climbing gear, and dangerous or hazardous items.
Fireworks , smoke canisters, air-horns, flares, whistles, laser devices, and other items that could be used to cause a disturbance or noise.
Banners , placards, flags, advertising or marketing messages, and other similar items that could be used to cause a disturbance.
Coolers , hampers, sleeping bags, blankets, and camping equipment.
Chairs , folding chairs and other seating equipment, including shooting sticks.
Any other items as directed by security staff or police.
* You can now buy Friday's historic Daily Mirror commemorating the death of the Queen here: mirror.co.uk/commemorative
