The items I sent to the UK, as mentioned got there with lightening speed. One i shipped, in early Dec.. a larger, 6" diameter x 34" L tube, left me on a Tues and was literally in the recipient's hands, in London, on the following Tuesday - one week later.
The other, made it to the recipient in 8 business days (not counting the weekend).
So, all in all, both myself and the recipient were very happy with the turn around times.
I can see tho, that a concern could be there (by the seller) that some buyers might "claim" non receipt of an item, especially if the tracking falls off the radar, once overseas. They then have the goods AND get the cash back.
So that could be a worry, without a doubt.