I post all orders by Royal Mail, and I do the post office run four days a week. Orders within the UK will be posted First Class, and international orders will be posted International Standard or Tracked, depending on the size of the order and destination. I find Royal Mail to be very reliable, but I am aware that sometimes parcels to countries like Canada can take longer than expected. Royal Mail estimate delivery times within Europe to be 3-5 working days, and 5-7 working days for the rest of the world.
Covid 19 Update: Please note that I am currently going to the Post Office with a reduced frequency of once a week. Smaller UK orders will be despatched more frequently.