The Common Furniture Beetle (Anobium punctatum
) is much less of a problem nowadays than it once was, as all timber used in house building for the past thirty years or so will have been treated, so habitat is restricted to furniture and older untreated timber.
For some reason woodworm particularly like plywood, and also seem to be developing a taste for oak furniture; especially if this is not properly dried, or has been stored in damp conditions. Woodworm like cool and damp conditions, so churches provide a natural habitat.
Woodworm will bore into French Polished wood, but will not usually bore through varnish or paint, as these protective films are too thick.
As others have commented, fresh holes will apper clean inside, and may have tiny piles of sawdust alongside them. Woodworm holes will also appear smooth and regular if viewed through a magnifying glass, and will connect to a bore of some description. Pinholes, on the other hand, will be irregular in shape, and will not have a connecting bore.
My guess is that if these holes are new, the woodworm will most likely have been brought into the building in a piece of furniture, or other timber.
I would advise the PCC as a matter of urgency. The PCC should advice the Archdeacon, and get an independent expert to inspect the church fabric as soon as possible. Woodworm are unlikely to have caused structural damage in such a short time, and treatment at this stage is fairly quick and easy, so it is best to tackle the problem now.
Treatment involves applying a liquid insecticide to all timber by brush, roller or spray. Permanently damp timber, which is especially at risk, can be protected by inserting rods of boron. Fumigation is not considered effective.
There is plenty of information online about this subject, including the following free guide from one of the treatment manufacturers: Guide to the Identification of Wood-boring Insects