Oh I am so sorry about your baby. Maximo a member here sells the Buddy Belt. IDK if she ships to the UK but you might pm her. Buddy Belts are what we use and the don't go anywhere near the neck. I know you are so worried, but a collar shouldn't be used at all on a small dog especially one with tracheal issues. I am sure you know that and that is why you are asking for help...here is a link to Kristin's (Maximo) thread. I hope she can help you out..
http://www.yorkietalk.com/forums/yor...ial-offer.html I will keep your baby in my prayers.