A film expiration date (really a use by this date) is essentially an intelligent guess by the manufacturer based on several factors But it is none the less a guess. In this case I really wouldn't worry unless the film was mistreated.
Agreed....the "expiry date" is the date the manufacturer guarantees (or, at least, suggests) that, given storage in accordance with their recommendations, the results will (for practical use) be unchanged from the film when new. Bearing in mind that film isn't like fresh food, but deteriorates only
very gradually, you should be fine treating the film as being fresh and metering and processing as normal.