Having given further thought to your posts here, it appears to me that there are three separate but interlinked matters that should be put before your solicitors for their consideration.
I will endeavour to make this as brief as possible in the knowledge that you will be able to supply more detailed information as required by your legal advisers and correct any facts that I may have misread or misinterpreted.
Firstly, by way of preamble, is the historic failure of your local/regional authority's social services department to make appropriate provision for your ds which resulted in him having numerous (48?) placements and periods of hospitalisation over a period of some years, culminating in his being placed cOctober 2011 on discharge from hospital with foster carers who, while having experience of self-harming adolescents, were not given accurate facts about his behaviour or his medication.
Within a very short time of commencement of this placement, your ds made a serious attempt on his life resulting in him being being detained in a private hospital some considerable distance from your home.
This, in turn, led to him being placed on a Section 3 (civil) order on c9 November. He was subsequently moved to the forensic adolescent unit at the Bethlem which is within easy travelling distance of your home in late December/early January(?) for reasons which would appear to be more connected with financial expediency than his care and treament needs, or your convenience.
Secondly, although you were understandably perturbed that the other patients in this small facility were 2-3 years older than your 14 yr old ds and had come to the unit via the youth offender services, you were reassured by your initial meeting with staff and believed him the best place.
However on Sunday 26 February in the company of 3 of the other patients, one of whom had removed the window and grate (security bars?) in his bedroom and two of whom were remanded in custody on serious charges (murder?) prior to their referral to the unit, your ds absconded from this secure CAHMS Tier 4 unit and made his way to London.
While his fellow absconders remained at large, some 7 hours later your ds made his own way back to the unit having been the victim of an attempted abduction and was subsequently interviewed by the police without your knowledge. (have you been told the outcome of this interview/any police investigation?).
You were not allowed/were unable to speak to your son for some 48 hours after this incident.
I repeat one of my earlier posts in saying that the above incident would appear to be a serious breach of the duty of care that should be expected from a CAHMS Tier 4 unit and raises a considerable number of questions, some of which I outlined in earlier posts, to which you are hopeful that your solicitor will be able to obtain answers.
This brings us to the matter of your ds having been moved from the unit, and the manner in which you were informed initially that any move would be temporary as the unit was due to be closed - presumably pending security works to the building - and subsequently informed that there could be no guarantee that your ds would be returned to the unit when it re-opened.
There is also the matter of your ds being transported to a hospital in Birmingham during which time, despite having committed no criminal offence or being detained on criminal section, he was handcuffed throughout the journey which resulted in him being presented at the wrong hospital before his eventual arrival at Ardenleigh.
Thirdly, there is the matter of why Ardenleigh was selected as an option for your ds and whether it is in his and his family's best interests for him to be placed so far from his home.