I have to wonder if your hot pepper cream (capsaiscin) is making things worse? Many of us here cannot tolerate this product, including me.

I use lidocaine on my feet during a flare. In the US there is a new lotion called Aspercreme lidocaine 4%. But I don't see it in the UK.

If you can ask your doctor for either Lidoderm patches RX, or a cream with 4 or 5% lidocaine made up for you, you could try it.
Apply to the tops of the feet...and up to and including the ankle.
This is a very numbing product and would work better for you I think.

If you get the Lidoderm (lidocaine) patches, 1/2 on each foot is enough. You might have to tape them down too...as the adhesive is not very strong with them. But the pain relief is nice. It takes about an hour to get going, so be patient.