East Sussex Childrens Safeguarding Board have released East Sussex Councils Response from April 1975 to the death of Maria Colwell, in response to a Freedom of Information Request .
The Councils Response is called “Children at Risk. A study by the East Sussex County Council into the problems revealed by Report of the Inquiry into the case of Maria Colwell.”  [click on link and it should download onto your computer to your downloads file or wherever]
Please note that victims of abuse may be triggered by reading this information. The Sanctuary for the Abused [A] has advice on how to prevent triggers. National Association for People Abused in Childhood [B] has a freephone helpline and has links to local support groups. Other useful sites are One in Four [C] and Havoca [D]
I have not yet studied fully the Council Response but unfortunately it cannot be properly evaluated without reading the Report of the Inquiry into the death of Maria Colwell Inquiry Report which is not freely available. The Maria Colwell case was a pivotal one, because it was so shocking, and the first to have an Inquiry.
The full title of the Inquiry Report is “Report of the Committee of Inquiry into the care and supervision provided by local authorities and other agencies in relation to Maria Colwell and the co-ordination between them” . 
It is no doubt available for a substantial sum of money from the privatised Her Majesty’s Stationery Office (HMSO), now privatised and called The Stationery Office (TSO) if you can get past their search facility. The reports should all be readily available free on line if we are to learn as a society the lessons from these tragedies. The relevant Local Authorities should proactively release these in their Publication schemes without having to be asked by numerous time consuming freedom of Information Requests.
This short summary of what happened to Maria is on Wavetrust .
Maria Colwell died on 6th January 1973, aged 7. Maria, removed from her mother’s care due to neglect, had been living happily with an aunt after her father’s death, but was returned to her mother at the mother’s request. Despite warnings of abuse, and 30 calls to social services from neighbours, she was left in a violent household. One neighbour reported the child being hit for being dirty, and saw her at a window with a blackened face “and one eye just a pool of blood.” The neighbour asked NSPCC and Social Services: “What protection does a child have against her parents? Does she have to be killed before they take her away?” In Maria’s case the answer was yes. Maria was taken to hospital in a pram, after being beaten by her stepfather the night before. She was found to be dead on arrival. She had 2 bruised eyes, bruising on neck, back, arms and legs, severe internal injuries and brain damage. Her stomach was empty. 
Community Care wrote about Maria 
Maria Colwell had been fostered by her aunt and uncle (Doris and Bob Cooper) for five years because her mother, Pauline, couldn’t cope with bringing up five children. Then Pauline decided she wanted Maria back. Guided by the notion of the birth mother’s rights, Maria was returned to Pauline on 22 October 1971 and moved into the council house she shared with her future husband William Kepple on Maresfield Road, Brighton.
What was left of Maria’s young life would be characterised by neglect, cruelty and distress. At 11.30pm on Saturday 6 January 1973, Kepple came home to find the six-year-old watching television. He beat and kicked her to death. Maria suffered brain damage, a fractured rib, black eyes, extensive external bruising and internal injuries. The pathologist described her injuries as “the worst he had ever seen”. Kepple, sentenced to eight years for manslaughter, had the term reduced to four years on appeal.
The government finally conceded to set up a full public inquiry after media pressure. Being the first of its kind it unwittingly etched the blueprint for all subsequent inquiries. Indeed, inquiries became the accepted means of dealing with death and abuse. 
An Extract of the Inquiry Report  is available from Oxford journals but registration and pay per view is needed for many articles.
An in depth Digest of the Inquiry Report  written by Robert Shaw on children Webmag.
But all this is no substitute for easy access to the report itself online.
Cases nowadays have to undergo a serious case review. Serious case reviews (SCRs) are undertaken by local safeguarding children boards (LSCBs) for every case where abuse or neglect is known or suspected and either a child dies, or a child has been seriously harmed and the case gives rise to concerns about the way in which local professionals and services worked together to safeguard and promote the welfare of children. [Dept for Education]. They are usually published on line.
However before approximately year 2000 there are approximately 50 reports , most of which have not been published. If anyone has the time to request any of these on the Whatdotheyknow  website many would be grateful.
It is just a matter of doing a bit of research into the exact name of the report if available, and the exact up to date authority to ask. Most details are available below. If anyone would like any help please contact me on firstname.lastname@example.org.
Individual Child Protection in the Community inquiries involving with Local Authorities/Health probation having prior involvement.
01.1945 Dennis O’Neill (Shropshire & Newport)
02. 1973 Graham Bagnall (Shropshire) Local Authority (LA) ND Health separate
03. 1974 Maria Colwell (East Sussex) LA
04. 1974 David Naseby (Staffordshire)
05 1974 Max Pizazzani Health and Local authority
06 1975 Stephen Meurs (Norfolk)
07 1975 Lisa Godfrey (Lambeth, Southwark & Lewisham) LA Health Probatiom
08 1975 Richard Clark (Perth) Secretary State for Scotland
09 1975 John George Auckland Secretary of State England
10 1975 Liza Godfrey Local authority Health and Probation
11 1975 Stephen Meurs Health Local Authority
12 1976 Neil Howlett (Birmingham)
13 1977 Wayne Brewer (Somerset) Area review Committee
14 1978 Karen Spencer (Derbyshire) LA and H
15 1978 Stephen Menheniott (East Sussex) Secretary of State
16 1978 Malcolm Page (Essex)
17 1978 Simon Peacock (Cambridgeshire and Suffolk) LA/Health)
18 1979 Darryn Clarke (Liverpool) Secretary of State
19 1979 Lester Chapman (Berkshire & Hampshire) LA Health
20 1980 Paul Brown (The Wirral)
21 1980 Carly Taylor (Leicestershire) LA
22 198? Darren Cooper (Leicestershire)
23 1981 Claire Haddon (Birmingham)
24 1981 Maria Mehmedagi (Southwark) LA Health Probation
25 1981 Emma Hughes (Calderdale)
26 1981 Christopher Pinder (Bradford) Area review Committee
27 1981 Daniel Frankland (Bradford)
28 1981 Malcolm Page LA Health
29 1982 Richard Fraser (Lambeth)
30 1982 Lucy Gates (Bexley) LA and Health
31 1982 Jason Caesar (Cambridgeshire) LA
32 1982 Gerard Fenlon (Cheshire)
33 1984 Shirley Woodcock (Hammersmith & Fulham) LA
34 1985 Jasmine Beckford (Brent) Refused 
34a 1985 Jason Swift Hackney/Islington Conewood St Childrens Home? Request 
35 1986 Reuben Carthy (Nottinghamshire Area Review Committee)
37 1986 Charlene Salt (Oldham) Review Committee
38 1987 Kimberly Carlile (Greenwich)
39 1987 Tyra Henry (Lambeth)  Doreen Mason (Southwark)
40 1988 Gavin Mabey (Leeds)
41 1988 Jason Plischkowsky LA
42 1989 Liam Johnson (Islington) Area Committee
43 Doreen Aston Review Committee ? See #45
44 1990 Stephanie Fox (Wandsworth) Request 
45 1990 Doreen Aston (Lambeth, Lewisham & Southwark) Not held 
46 1992 Leanne White (Nottinghamshire) Refused
47 1994 Rikki Neave (Cambridgeshire) Request 
48 2000 Lauren Wright (Norfolk) Request 
July1988 The Secretary of State Cleveland Inquiry .
1999 Aliyah Ismail Serious Case Review (SCR) 
Links and References
 Children at Risk. A study by the East Sussex County Council into the problems revealed by Report of the Inquiry into the case of Maria Colwell https://www.whatdotheyknow.com/request/194507/response/481776/attach/3/FOI%202014%203453%20Children%20at%20Risk.pdf
 FOI request re Councils Response https://www.whatdotheyknow.com/request/children_at_risk_a_study_by_the#outgoing-333488
 In Depth Summary of Maria Colwell Inquiry Report by Robert Shaw of Children Webmag http://www.childrenwebmag.com/articles/key-child-care-texts/the-maria-colwell-reportchaired-by-tg-field-fisher
 Maria Colwell Inquiry Report Extract http://bjc.oxfordjournals.org/content/15/1/88.extract
 “A tale of 10 children” summaries of 10 childrens deaths http://www.wavetrust.org/key-publications/articles/tale-10-children-2005
 Community Care Article What have we learned? Child death scandals since 1944 http://www.communitycare.co.uk/2007/01/10/what-have-we-learned-child-death-scandals-since-1944/#.Uv0n8s5WppU
 Argus Climbie and Colwell Article http://www.theargus.co.uk/archive/2003/01/31/6743294.Climbie__Lessons_must_be_acted_upon/?ref=arc
 Committee of Inquiry into the Care and Supervision Provided in Relation to Maria Colwell (1974). Report of the Committee of Inquiry into the care and supervision provided by local authorities and other agencies in relation to Maria Colwell and the co-ordination between them(Chairman: T. G. Field-Fisher) London: Her Majesty’s Stationery Office
 Victoria Climbie Report http://www.publications.parliament.uk/pa/cm200203/cmselect/cmhealth/570/570.pdf
 The Stationery Office Shop http://www.tsoshop.co.uk/
 Serious Case Review Department for Education http://www.education.gov.uk/childrenandyoungpeople/safeguardingchildren/reviews
 Whatdotheyknow FOI website https://www.whatdotheyknow.com/
 Aliyah Ismail Serious case review https://cathyfox.wordpress.com/2014/01/26/serious-case-review-aliyah-ismail-harrow-1999/
 Tyra Henry Death Report Lambeth https://cathyfox.wordpress.com/2013/11/24/death-of-tyra-henry-report-1987-lambeth/
 Leanne White Refused https://www.whatdotheyknow.com/request/report_of_overview_group_into_th#incoming-482828
 Jasmine Beckford refused https://www.whatdotheyknow.com/request/report_of_inquiry_into_the_death
 Doreen Aston refused https://www.whatdotheyknow.com/request/report_of_the_inquiry_into_the_d
 Lauren Wright FOI request https://www.whatdotheyknow.com/request/lauren_wright_child_protection_i
 Rikki Neave FOI request https://www.whatdotheyknow.com/request/rikki_neave_child_protection_inq
 Hackney Jason Swift FOI https://www.whatdotheyknow.com/request/jason_swift_2
 Stephanie Fox Wandsworth FOI request https://www.whatdotheyknow.com/request/stephanie_fox_practice_review_wa
[A] Sanctuary for the Abused http://abusesanctuary.blogspot.co.uk/2006/07/for-survivors-coping-with-triggers-if.html
[B] NAPAC http://www.napac.org.uk/
[C] One in Four http://www.oneinfour.org.uk/
[D] Havoca http://www.havoca.org/HAVOCA_home.htm
cathyfox the truth will out