We take a late afternoon train from East Kent, and get to the Tate Britain art gallery around 8pm. Tate Britain is the start of the accessible route to the Queen’s lying in state.
Things here are calm and well organised. There is a large St John's ambulance first-aid point. There is a wristband system for disabled people. The queue for this stretches along Millbank and we cannot initially see how long it is. It ends roughly at the end of the paved garden area in front of Tate Britain.
We join the queue and it takes about half an hour to reach the front. There are a couple of accessible toilets in the queue and a light buzz of camaraderie. I am told there is a changing places toilet on site although I personally do not see it.