I thoroughly enjoyed this Will Hay comedy, which successfully combines the school story and the requisite nod to wartime concerns with the spoof haunting theme that had featured in some of his most successful earlier work. The old team of Graham Moffat and Moore Marriott are here absent, but Hay is teamed very effectively with chinless Claude Hulbert and a young Charles Hawtrey as a precocious schoolboy. Hay's protagonist treads a skilfully effective line between annoying (we relish watching him get taken down a peg, rather than wincing) and sympathetic, while Hawtrey's gadfly-like persistence as a boy far brighter than his teachers is equally well judged, and Claude Hulbert makes ineffectuality likable.

The film has its share of broad comedy (watch for what Hay does with that piglet...) but often avoids obvious expectations, and is the funnier for it. The suspiciously Teutonic teacher is not, of course, what he seems; the ghost is, of course, not what it seems either; and the motivation which ultimately enlists the boys on the side of their erstwhile petty dictator is certainly not the type customary in school stories!

Overall "The Ghost of St Michael's" is a blend of guffaw-rich visual humour with accomplished misdirection to produce a very appropriate vehicle for its star. The beginning is a little hit and miss, but the film is still full of laugh-out-loud moments.

In his Hay-Day Will Hay seldom put a foot - or a tonsil – wrong, the Ghost Of St. Michael's was no exception, proving to be yet another classic. Set in a haunted castle on the Isle Of **** (in case Jerry wanted to know the direction to Skye) I've seen this so many times now that I find it sometimes hard to remember they were all really in Ealing's studios even though it was cheaply and simply made. Such is the power of auto-suggestion!

Because of the War an English boarding school is evacuated en masse to a castle in Scotland, of which the wild eyed porter John Laurie informs the scoffing new science master Hay and forward pupil Charles Hawtrey that it is haunted with the ghost of a phantom piper. Hay strikes up a friendship with fellow silly master Claude Hulbert, but doesn't impress the weird Head Felix Aylmer and incurs the derision of nasty senior master Raymond Huntley – which doesn't matter as these two don't last very long. So many favourite bits: the lesson in the draughty classroom on What Goes Up Must Come Down – with a disinterested Gerald Campion (the future TV Billy Bunter) sat behind Hawtrey – where Hay is taught a lesson; the dormitory feast where Hay gets tight on some jolly good lemonade to the delight of the boys; displaying his deep knowledge of gases to the boys in the science lesson; the denouement which could so easily have ended flat; but especially the delicious inquest in the barn, of which you must already know I'm going to say all I can say is Fiddlesticks!

In the decades before it got out onto DVD it was my most borrowed or copied tape by friends, which is why it's surprising to me that there have been so few commenters here so far. It's always been one of my favourites, a totally un-nasty un-cynical non-violent harmless old fashioned piece of fluff and a, no, the classic of its kind.

The fact that Will Hay is playing an incompetent school teacher isn't much of a surprise. After all, he played this sort of guy in several films. However, what makes this one unusual is that the comedy becomes a murder mystery!

When the film begins, Will Lamb (Hay) is on his way to a boys school in Northern Scotland. This actually makes a lot of sense, as children throughout England were either sent abroad or to the most rural portions of Britain in order to avoid the German blitz. In this case, an entire school has been packed off to an old castle on the Island of Skye...about as remote a location as you can get! However, very soon it's apparent that Lamb is an idiot and can't teach much of anything well but before he can get the sack, the headmaster is dead--either a suicide or murder. The new headmaster knows Lamb and his incompetence and his first act is to fire Lamb. But, very soon after, this new headmaster is also dead...poisoned just like the first one. So, Lamb, one of the professors and some of the students decide to investigate. But they are warned repeatedly about some sort of ghost and some bagpipes...and what do they have to do with any of this?!

This is a pretty good film, though compared to some of Hays' other films, comedy is less important to the film and the murder mystery often takes precedence. And, considering it was made during WWII, the Nazi angle didn't come as much of a surprise. Definitely a product of its times but a good one as well...one that stands up pretty well today.

By the way, Hay playing an incompetent science teacher is rather funny, as in real life he was, in addition to being an actor, an engineer and astronomer!