Milan is a useful label for the route, but the collection address may be in the city or elsewhere in Lombardy. Give the municipality and full address, then note whether there is an agreed place for the vehicle to stop while passengers and pet equipment are loaded. This prevents a regional enquiry from being treated as though every pickup begins at the same point.
Share the UK delivery address, passenger count, pet size, luggage and any crate or carrier details. If the animal has a specific routine or needs extra time to settle, describe that when asking about the route. The plan can then be reviewed around the actual collection and destination rather than a generic Milan-to-London template.
Genoa and Turin cover other northwest-Italy origins; Verona and Venice are separate northeast-Italy starting points.