esa50 form question.

Helping the wife fill in her esa50 review form.

I have a query on the mobility section.
Letter of support from go states 20 metres before needing to stop.

Would I be ticking the 50 metre box or the varies and stating 20 metres?
Although the distance doesn't vary.

Don't tick any of the boxes if they do not accurately reflect your limitations. Leave the tick-boxes empty and use the text-box to explain your mobility abilities and limitations.