(UK, at least) how are circumcisions without a medical licence + medical reasoning still legal?

NHS doctor struck off over botched circumcision still performing operation

‘Catastrophic failure of safeguarding’ highlighted by fact Zuber Bux’s lay practice is legal, campaigners say

www.theguardian.com

The mind boggles. Conservatives are up in arms about licensed medical professionals pursuing valid medical treatments for transpeople, but it's A-OK for even a layperson to go around chopping off foreskins.

(yes, the question I posed in the thread title is rhetorical... cue Fiddler On The Roof 'tradition!')