Health Care Professional Council (HCPC) - check if your podiatrist is on the HCPC list 

https://www.hcpc-uk.org/check-the-register/

Society of Chiropodists and Podiatrists (SOCAP) - check if your podiatrist is a member of SOCAP

https://www.cop.org.uk/find-a-podiatrist/

Common foot problems - advice

https://www.cop.org.uk/foot-health/common-foot-problems/