This new system sounds dreadful and wasteful.
However it is a fact that 1000s of appointments a day, be it at the GPs, outpatient clinics, or even OPERATIONS - are missed by people who give no notice despite reminders- taking someone else's place and costing 100s of 1000s tothe NHS. When I went for a knee op a just before we moved- 2 or 3 out of a list of 10 had not turned up at all. When you think of waiting lists- that is shockingly shameful. Theatre, surgeons, anesthetist, radiographers, nurses, assistants, etc, etc - all wasted.
This just does not happen in most countries- as they would be billed for the cost- 100s, 1000s even- and pursued through the courts, etc.