I agree with all the informative posts you have had 3 kings - I would just add that VO's like Barnardoes don't "promote" approved adoptors to the LA, they sell them. As has been pointed out LAs will not buy approved adoptors from VO's simply because they do not have the finance available. In my experience LAs SSDs have been under resourced for many years (like many other public services) but since this govt was elected, they have slashed the budgets of all public services, and at the same time want improved services. Cameron wants adoptions to be speeded up, but this can't happen with fewer and fewer social workers, and he doesn't make it clear what he means by "speeded up" - imo a comprehensive assessment is absolutely essential. I don't think he knows what he means either!
This lack of funding does mean unfortunately that children who have Placement Orders (made by the Court meaning that the child can be placed for adoption) will be fostered, whilst awaiting an "in-house" adoption placement, and of course the older the child, their chances of adoption grow more and more remote.
I also agree with LAs saying they are not recruiting adoptors who are looking for a young child without any complications. They do not have the finance to be training applicants for something for which there is no need. The need for adoption nationally is for children with disabilities, sibling groups and older children (middle years age) although many children awaiting adoption have little hope after they are about 7, especially if they are boys. Well that was what was happening in the LA with whom I worked for a very long time.
I wonder what age range you are thinking of 3 kings but I also agree that you cannot lose anything by approaching as many neighbouring LAs as you wish and VOs. When talking with VOs (like Barnardoes) how many children of the age range you are interested in they have placed in the past 2 years.
I am aware that even though the task of post-adoption support is a duty on LAs, but of course they do not have the staff to carry this out. The VOs will only provide post-adoption support if the LA will pay, and this is the reason why Barnardoes may not be offering post adoption support.
The other thing is that many of the VOs do not explain to applicants that they do not have children and they have to sell families to the LA and it depends on whether the LA have the funding to buy the family. It is therefore highly likely as many posters have already said, that it is the children/sibling groups with more complicated backgrounds that LAs may have to buy such a family from the VOs.
So 3kings you could innocently ask the VOs (like Barnardoes) how the system works and whether they have children to place etc etc and if they use words like promote the families, press them to explain what this means!
There are some LAs who have a contract with VOs (like Barnardoes) to provide families for specific children e.g. children with profound disabilities, respite care for disabled children etc. but I have been retired for some years and I suspect these contracts no longer exist because of lack of funding.