Does Britain need four new OPVs each year?

Would four OPVs per year be more than Britain needs?

The reply broadens the order to OPVs and mine-warfare ships, gives a roughly 28-32-ship presence proposal, and allows eventual resale.

A participant challenges whether Britain needs four OPVs each year. Alex includes mine-countermeasures vessels in the proposed workload and suggests selling ships once requirements are met. His deployment example places four in the Mediterranean, eight around the UK and four each in the Caribbean, Far East, Middle East and Falklands. He totals that as 28, then suggests 32 without explaining the extra four. The comparison is with sloop deployments around 1930, and the purpose is persistent forward presence.