Does all uk post to france go by air mail

No, not all UK post to France goes by air mail. The mode of transportation used for sending mail from the UK to France depends on various factors, including the type of mail, its weight, size, and the service chosen by the sender.

Here are some general guidelines:

1. Standard Mail: For standard mail, such as letters and small packets, Royal Mail (the UK's postal service) typically uses surface mail, which is transported by sea and land. This mode of transportation is generally slower than air mail, taking around 5-7 working days to reach France.
2. Airmail: For heavier or larger items, or for those that require faster delivery, Royal Mail may use air mail. Airmail services are typically faster, taking around 1-3 working days to reach France.
3. Priority Services: For time-sensitive or high-priority items, such as express packages or courier services, Royal Mail offers priority services like Royal Mail International Tracked, Royal Mail International Signed, or courier services like DHL, UPS, or FedEx. These services typically use air transportation and offer faster delivery times, often within 1-2 working days.
4. Special Services: Some special services, like Royal Mail's International Signed For or International Tracked services, may use a combination of air and surface transportation, depending on the destination and the service chosen.

In summary, while some UK post to France may go by air mail, not all mail is transported by air. The mode of transportation used depends on the type of mail, its weight and size, and the service chosen by the sender.