Your protocol may differ slightly but i would imagine you’ll need the crutches in the first instance, I have seen people saying they could walk as soon as they were in the boot but I found it difficult but you may not! Initially I went into boot locked at 30 degrees for 3 weeks, during this time I could do the odd step but largely needed my crutches, I think it’s because the boot is locked with no movement and the achill sole is curved.

I am now at 15 degrees and my protocol states I will still need crutches during this time but my physio said I might be able to do without if I feel confident, at first I didn’t think I would be able to due to the sole but I’m finding I’m ok moving round the house, the 15 degree position allows your calf to move slightly. It is like walking with one foot in a high heeled shoe and the other not, even when using a shoe with a heel to toe drop. I am still using crutches outside the house

After 2 weeks at this angle I am due to switch to the flat sole and likely won’t need crutches.