I tried to do this and found it very easy. I suppose it would be a more stringent test for someone who is ESL and not very tech competent.
I am impressed with the careful and clear use of language to explain everything. It is just so easy to understand what is going on, where I am on the site, and what I need to know.
1 in 6 adults in the UK have poor literacy skills [0] so it's important for the Gov website to clearly give information to people who maybe don't have the best comprehension even in their native language, especially when it comes to government/legal matters.
[0] https://literacytrust.org.uk/parents-and-families/adult-lite...
A friend, tried to apply for a heavy goods vehicles driver visa; but he couldn't find a simple how-to, unfortunately.
Start at https://www.gov.uk/