I have a bit of a different perspective on this, as I do not inject. Instead, I have a hereditary condition that predisposes me to blood clotting. It does not affect my everyday life beyond difficult menstrual cycles, but I will need to take additional precautions if I ever have a child or have surgery. All of the women on my mother's side of the family are similarly affected. We did not know until my aunt nearly died in childbirth. The clot was in her leg and if it had made its way to her heart or lungs, she wouldn't be alive. (My aunt doesn't use any recreational drugs aside from wine.)
brimz, the dangers associated with injecting are many, but DVT 3 times? Yikes! I've never interacted with you directly, but I think well of your posts. There is an organization called the National Blood Clot Alliance and they do have a UK branch. The main website is
www.stoptheclot.org. I don't think they address drug use directly. They are a wonderful source for information regarding clotting disorders. It is possible that you have the same condition as I do (Factor V Leiden), or similar. It is not as uncommon as people think, and there are two ways to know: genetic testing or the hard way. Knowing that I am predisposed in advance will preserve my health. DVT is a really big deal. Often it is misdiagnosed. The stories on the Stop the Clot website and the people involved have helped me. The fact that I am really scared of needles has also helped - assuredly, I have my problems, but I don't like needles.
If you do not already have compression stockings (basically, knee-high socks with a twist - a doctor can advise you on this and they're available at most pharmacies), grab a couple of pairs and don't get on a plane without them! They're not stylish, at all. If you choose to inject, which a 3-time DVT person should not, it is
imperative that you don't inject into the femoral artery.
I wish you the best and if you have any questions beyond what I've described as my experience, please PM me. More importantly you should seek treatment for your addiction, IMO. Take care of yourself, seek genetic testing... and please, please, please stop injecting. It is a path to nowhere good. Whatever is going on in your life, you are still here. I'd like to see it remain that way.