Just a quick post to let you know where you can buy a Time Timer Watch in the UK. I had been looking around for a while, in an effort to buy one of these watches. I could find links to the USA, but the UK branch that I was redirected to did not stock the watch (See video below for features).
Anyway I got in touch with Robo Educational Toys in the Netherlands (which is where I got my Time Timer software update for my Mac computer from), and they thankfully pointed me to a UK supplier Alphabet Educational Supplies. Whilst they seem more expensive (in comparison to the US sites), if you were wanting to place a large order, you could contact them beforehand and they could look into offering a discount for you. NB: Please note that this would obviously vary depending on the quantity ordered.
All of the range of timers are excellent resources for teaching.