Who writes British Standards?

Could you please elaborate on the process and entities involved in writing British Standards? Who are the primary authors and contributors? Are they industry experts, government officials, or representatives from other organizations? Is there a formal process for proposing, drafting, and approving these standards? Additionally, how do these standards ensure consistency, accuracy, and relevance in the British industry? I'm particularly interested in understanding the roles and responsibilities of the various parties involved in the creation of these influential documents.