The old Llandudno Heritage Trust commissioned a detailed report back in 1992, which had several detailed recommendations. But the amount of petty bickering, in-fighting and malicious activity among the town councillors of all parties ensured nothing came of it. However, one excellent example is Miami, which has very similar problems. They used the US corps of engineers to dump billions of tons of sand on the beach.
The North Shore beach issue is interesting, partly because I doubt many councillors even barely comprehend it.
Facts: 1. Sea levels are rising, although extremely slowly.
2. The West and North West of the UK land mass is also rising, something a lot of folk don't know.
3. The North shore is protected by the current prevailing wind systems.
4. To stop potential storm damage the beach levels need raising. Millions of tons of sand would accomplish that just as well as dumping the absurd shingle.
So a sand restoration project would seem the sensible option. It would have to be ongoing. The EU would give generous grants for that...