1 June 2011
Four people are arrested after BBC Panorama revealed a pattern of serious abuse at the Winterbourne View private hospital near Bristol.
The programme set up undercover filming after it was approached by former nurse Terry Bryan.
Hospital's owners Castlebeck, apologised and suspended 13 employees.
NHS South West said it was "appalled" and the Care Quality Commission said there was an "unforgivable error of judgement" in not investigating earlier abuse claims.
7 June 2011
Five more people are arrested over abuse allegations at Winterbourne View.
8 June 2011
An e-mail from a hospital manager showed five safeguarding concerns were raised about the hospital with South Gloucestershire Council before Panorama filmed there.
9 June 2011
Two more people are arrested while local MP Jack Lopresti calls for the hospital to be closed down .
10 June 2011
A date for a serious case review into what happened at Winterbourne View is set.
17 June 2011
Two nurses, Sookalingum Appoo and Kelvin Fore, are suspended from the nursing register while abuse claims are investigated.
20 June 2011
Winterbourne View is to close , it is announced. Castlebeck said it would transfer patients and would conduct an internal inquiry.
Jack Lopresti MP said: "I stand by my call for the hospital's closure and I am pleased that Castlebeck have come to the same conclusion.
"Given the horrific events which have taken place at Winterbourne View I believe its future running is untenable."
24 June 2011
Winterbourne View closes while a group of 86 organisations called for action to stop a repeat of the alleged abuse.
They wrote to the prime minister asking that the use of residential hospitals be stopped.
The Department of Health said a serious case review would consider the points raised.
19 July 2011
A Care Quality Commission report found there was a "systemic failure to protect people" at Winterbourne View.
The report said "some staff were too ready to use methods of restraint without considering alternatives".
The CQC's director of operations Amanda Sherlock claimed Castlebeck had "misled" them.
Castlebeck said: "We are truly sorry for the failures which led to the terrible mistreatment suffered by patients at Winterbourne View."
A 12th person is arrested over abuse allegations at the hospital.
28 July 2011
Workers at Winterbourne View raised concerns about staff behaviour to South Gloucestershire Council 19 times before Panorama filmed there, it is revealed.
8 November 2011
An NHS South West report criticises how contracts for Winterbourne View were drawn up.
BBC West health correspondent Matthew Hill said the report showed the contracts had no built-in mechanisms to show how quality could be assured.
28 November 2011
Ten people are charged in connection with ill treatment and neglect of patients at Winterbourne View.
The 10 people face a total of 40 charges against four patients under the Mental Capacity Act.
19 January 2012
Eleventh person is charged over allegations of abuse at Winterbourne View.
9 February 2012
Three people admit the ill treatment of residents at Winterbourne View.
Wayne Rogers, 31, and Allison Dove, 24, both of Kingswood, admitted to nine and seven charges each and Holly Draper, 23, pleaded guilty to two charges.
16 March 2012
Four more people admit the ill treatment of residents at Winterbourne View.
Graham Doyle, of Patchway, admitted seven charges; Danny Brake and Jason Gardiner, both of Bristol, admitted two and Sookalingum Appoo of Bristol admitted three charges.
18 April 2012
Two more admit abuse charges at Winterbourne View.
Kelvin Fore, 33, of Middlesbrough, and Neil Ferguson, 27, of Emersons Green, near Bristol, pleaded guilty to abusing the same patient in March last year.
23 April 2012
Winterbourne View is bought by Glenside Manor Healthcare Services who say they will reopen it as a neurological rehabilitation centre in 2013.
24 July 2012
Two council managers are sacked as a result of events at Winterbourne View.
Both managers were responsible for safeguarding vulnerable adults, the BBC understands.
6 August 2012
The last of 11 people accused of the maltreatment of five patients at Winterbourne View admitted guilt over the case.
Michael Onyema Ezenagu, 28, of White City, London, was due on trial at Bristol Crown Court but admitted two charges of ill-treating a patient.
7 August 2012
An independent report into Winterbourne View said fundamental changes are needed in how care of vulnerable adults is commissioned and monitored.
Owners Castlebeck took "financial reward without the responsibility", the report's author Margaret Flynn said.
South Gloucestershire Council said it "fully accepted" the findings.
Castlebeck said the criticisms in the report were being "actively addressed".
22 October 2012
24 October 2012
Avon and Somerset Police reopen inquiries after BBC investigation shows that patient Ben Pullar has two teeth knocked out.
10 December 2012
The government plans a "dramatic reduction" in the number of people with learning disabilities in hospitals in the wake of the Winterbourne View abuse scandal.