- 15 July 1843
Charles William Cayzer born
Union Steam Ship Company formed
Charles William Cayzer employed by William Nicol & Co. in Bombay
Donald Currie & Company formed
Charles William Cayzer leaves Nicol & Co and briefly moves to Cardiff
- 21 January 1876
August Bernard Tellefsen Cayzer born
Charles William Cayzer moves to Liverpool where he begins trading as Charles Cayzer & Co
Charles William Cayzer establishes Cayzer Irvine & Co in Liverpool, having made business contacts in Glasgow
Clan Alpine, Charles William Cayzer's first steamship, built in Glasgow
- 23 July 1881
Herbert Robin Cayzer born
Clan Line Association Steamers formed, managed by Cayzer Irvine & Co, and 109 Hope Street, Glasgow becomes company headquarters
Castle Packet Company becomes Castle Mail Packet Company
Clan Line Steamers Limited is formed
- 1892 - 1896
Charles William Cayzer becomes Member of Parliament (Conservative) for Barrow-in-Furness
Charles William Cayzer knighted
Union Steam Ship Company and Castle Mail Packet Company amalgamate to become the Union-Castle Steamship Company
- 12 December 1904
Charles William Cayzer created 1st Baronet of Gartmore
- 28 April 1904
August Bernard Tellefsen Cayzer marries Ina Frances Stancomb
Cayzer Irvine & Co becomes a limited company
- 1908 - 1909
Sir Charles William Cayzer fails in his attempt to be elected MP for Monmouth Boroughs
- 21 January 1910
(William) Nicholas Cayzer born.
Union-Castle Line taken over by Royal Mail Steam Packet Company
Britain enters the First World War. Six Cayzer family members and company directors are called to active service.
- 28 September 1916
Sir Charles William Cayzer 1st Bart., dies
- October 1916
August Cayzer becomes chairman of Cayzer, Irvine & Co. He appoints his brother Herbert Cayzer as deputy chairman, with an identical salary to his own.
Assets of the Scottish Shire Line acquired, adding refrigeration capacity to the fleets.
August Cayzer is instrumental in the purchase of the Greenock Dockyard Company, putting Cayzer Irvine & Co in the unique position, for a shipping line, of possessing its own shipyard. The company headquarters move to No. 2 St Mary Axe in the City of London
August Cayzer begins to rebuild the firm by acquiring the British & South American Steam Navigation Company.
August Bernard Tellefsen Cayzer is created 1st Baronet of Roffey Park in recognition of his and the Clan Line's services to the war effort.
Sir Charles Cayzer, 3rd Bart., wins the parliamentary constituency of Chester for the Conservatives and remains their M.P. for 20 years.
- January 1924
Herbert Robin Cayzer is created 1st Baronet of Tylney in the New Year's Honours list
Clan Line's capital is reduced from almost £4 million to under £2 million. It is forced to sell the British & South American Steam Navigation Company to the Royal Mail Group
The crash of the New York Stock Exchange brings dire consequences for world economics and trade. The Great Depression begins.
- 1933Fred Bedford the Managing Director of Cayzer, Irvine & Co., is forced to introduce a 10% salary cut across the firm as a result of the worldwide economic depression.
Union-Castle Line becomes independent again
Both the Clan Line, its associated Greenock Dockyard, and Union-Castle are much affected by wartime requisitioning.
- 8th June, 1939
Sir Herbert Cayzer created 1st Baron Rotherwick of Tylney in the King's Birthday Honours
- 28 February 1943
Sir August Cayzer dies. Lord Rotherwick becomes the chairman of the family business
By the end of the war Clan Line have lost 37 ships and Union-Castle 11 through enemy action.
Clan Line buys eight freighters, limited shipyard capacity and high building prices preventing the construction of new ships.
Union-Castle negotiates new mail and freight contracts with the South African government.
Mrs Smuts launches the Pretoria Castle in Belfast by radio from South Africa.
- 15 October 1953
Clan Line take over Hunting Group's air transport and servicing business. Hunting-Clan Air Transport is formed.
Hunting-Clan Air Transport begin a weekly 'Africargo' service.
Clan Line group merges with the Union-Castle Line group to form the British & Commonwealth Shipping Company Limited.
Hunting-Clan begins to offer passenger flights and package holidays.
- 17 March 1958
Lord Rotherwick dies. Sir Nicholas Cayzer 2nd Bart., (of Roffey Park) becomes Chairman of British & Commonwealth
British & Commonwealth purchase Springbok Shipping Company.
Hunting-Clan merges with Airwork to form British United Airways.
British & Commonwealth purchases Hector Whaling Company.
The decision is made that the Clan Alpine will be the last ship built for Clan Line.
Air Holding Limited is formed, bringing together major shipping companies with an interest in air freight including British & Commonwealth
British & Commonwealth take a 36 per cent interest in the South African Marine Corporation [Safmarine]
British United Airways is bought by Caledonian Airlines. It becomes British Caledonia.
- 1 January 1982
Sir Nicholas Cayzer is created Baron Cayzer of St Mary Axe in the City of London in the New Year's Honours.
Caledonia Investments separates from British & Commonwealth