There is no easy or simple answer to the issue of helping overseas dogs, when there are many dogs in the UK sitting in pounds. Just looking at Wales, for instance, each year approximately 10,000 strays enter the system. Of these, roughly 4000 are reunited with their owners, and that leaves 6000 dogs needing to find homes. Unfortunately not all of them do, and around 500 dogs are killed in pounds each year (though thankfully the number has slowly declined in recent years). On top of these strays, rescues directly receive many dogs that are relinquished by their owners, and there is a steady stream too of ex racing greyhounds needing homes, as well as the pitiful dogs being spat out by puppy farmers, many of which end up in rescues. Believe me, if you want to home a needy dog, the UK can easily supply your requirements.
However, like many dog owners and animal volunteers, I share your concern about conditions for animals (not just dogs) overseas. My own view is that while I don't personally support importing dogs, I do support giving aid and assistance to developing sustainable long term dog welfare programmes in other countries. That could include donating, or it could mean providing help in setting up the long term political lobbying needed to change attitudes and the legislative framework. Simply importing a dog without attempting to change the setting that generates them is not sustainable and only creates a vacancy.
To give an example, Welsh greyhound activists have recently been involved in working with Irish volunteers to set up a greyhound welfare group that will campaign and lobby for better treatment for greys in the ROI - desperately needed. Another example is Sighthounds Online, a British sighthound charity, working to support galgo rescue organisations in Spain, by helping to fundraise to support veterinary costs and their Spanish shelters.
It's a very difficult issue, and there are a spectrum of views across the animal welfare community, many of which have powerful arguments.
If you are an experienced dog owner, and think you could provide a home for a dog that has undergone severe trauma, and may have been exposed to diseases not found in the UK such as Leich, then I wish you well.