Sassymay I am really sorry to hear your situation and really hope it will all work out for you and your family.
When you say "... our children would really like one more sibling and we are keen too." Do you mean the family all want another child or they all want to adopt a child? Is there a reason for choosing adoption instead of a birth child. Please excuse the question and feel free not to answer it or to pm me. I am not being nosy I am trying to see what the kids are very excited about. My birth dd wanted a new sibling too and originally she wanted a baby (and so did we) but over many years of trying this did not happen and for at least a few years we have been discussing adoption as an option.
Can I just comment on one more thing that stood out for me from what you wrote, which also rings bells with me etc.
You said "Especially as we are constantly told what a lovely family, well behaved, happy, musical, academic, etc. All our referees have been incredibly positive. We have great support network."
We have one birth DD and she is very much in favour of us adopting and my social work was very keen to stress the fact that although she is excited and wants this to happen there will be problems, stresses etc when it happens and also that there may be worries and fears she is not telling me etc.
Also, our referees all gave us very glowing reports and stressed how involved we are in our local community and church and how much we do for others etc. All this sounds very good but also made me wince a bit because I know that when the child comes (if we are approved) I will need to make the child a priority and all the other stuff we do etc will need to take a step back! For how long? I don't know, as long as it needs to be that way. I am the kind of person who likes to volunteer for stuff and thankfully my church knows all about the adoption and won't let me volunteer for anything new in case I take on too much!
When I read about your family well behaved, happy, musical, academic I thought I wonder how the new child will fit in. Will they be those things, possibly, but unlikely. How will you deal with a child whose behaviour is so different from your birth children? Will you cope if they do not turn out to be academic or musical as well. Will they be able to fit into your family and feel fully valued if they do not turn out being similar to the other children. Just asking this as, in my humble opinion, this is relevant. I am sure that you have considered all this and maybe said that it is OK however they turn out. Have you talked to the social worker about this aspect of the new child and considered that impact on family life? I am sure you have but I wanted ask about it.
Our birth DD is not at all academic, in fact she is almost certainly dyslexic and her behaviour went very difficult and problematic for about 2 years (possibly as a result of the problems with school work). Thankfully we are seeing a massive improvement in behaviour and we are working hard to try and get help for the dyslexia. When we first met the social worker she assumed our DD was perhaps your bog standard birth child, no behaviour problems and doing well at school etc and asked us how we would handle the opposite. I said we had the opposite and had dealt with it and so in short I was able to think through and provide some evidence for how we would cope with a child who is not the 'standard child'.
I am quite sure as you sound a lovely, caring person, that you too could cope with a child who is not the 'standard child'. Does the social worker know about that? Will you be willing to make time and space for the new child which might impact on the time and space you will have for your three children already? There is really no might about it! They will impact on family dynamics.
Referees probably know you as a 'normal family' and seeing you do very well with your birth kids, it may be that you need to fill in the gaps and say how you will cope with things that are out of the ordinary.
I would take all the advice you can from any organisation that can help and I would (personally) go to the panel to defend your opportunity to adopt unless the organisations give you advice not to.
Anyway, I really wish you all the very best and think the others have provided excellent suggestions.