Leaf-class tanker

The Leaf class is a class of support tanker of the Royal Fleet Auxiliary (RFA), the naval auxiliary fleet of the United Kingdom. The class is somewhat unusual as it is an amalgam of various civilian tankers chartered for naval auxiliary use and as such has included many different designs of ship. Leaf names are traditional tanker names in the RFA, and are recycled when charters end and new vessels are acquired. Thus, there have been multiple uses of the same names, sometimes also sharing a common pennant number.

The role of support tanker generally involves the bulk transport of fuel oils between distribution centres, the replenishment of front-line fleet tankers such as the Wave-class tanker and Fort Victoria-class replenishment oiler classes and using their replenishment at sea (RAS) abilities to allow them to directly support naval warships. For RAS, Leaf-class ships have an amidships derrick allowing a single vessel on either beam and a single point for a vessel astern.

RFA Appleleaf

 * (1979–1989) RFA Appleleaf (ex-Hudson Cavalier) – A79 – 40,200 tons, to Royal Australian Navy as HMAS Westralia (O 195)
 * (1960–1970) RFA Appleleaf (ex-George Lyras) – A83 – 22,980 tons

RFA Bayleaf

 * (1982–2011) RFA Bayleaf (ex-Hudson Progress) – A109 – 37,700 tons, chartered originally for Falklands War
 * (1959–1973) RFA Bayleaf (ex-London Integrity) – A79 – 17,960 tons

RFA Brambleleaf

 * (1979–2009) RFA Brambleleaf (ex-Hudson Deep) – A81 – 40,200 tons
 * (1959–1972) RFA Brambleleaf (ex-London Loyalty) – A81 – 17,960 tons

RFA Cherryleaf

 * (1973–1980) RFA Cherryleaf (ex-Overseas Adventurer) – A82 – 18,560 tons
 * (1960–1966) RFA Cherryleaf (ex-Laurelwood) – A82

RFA Oakleaf

 * (1986–2009) RFA Oakleaf (ex-Oktania) – A111 – 50,000 tons

RFA Orangeleaf

 * (1984–2015) RFA Orangeleaf (ex-Balder London) – A110 – 33,750 tons
 * (1959–1978) RFA Orangeleaf (ex-Southern Satellite) – A80 – 17,470 tons

RFA Pearleaf

 * (1960–1985) RFA Pearleaf – A77 – 25,790 tons

RFA Plumleaf

 * (1960–1985) RFA Plumleaf – A78 – 26,480 tons

Second Leaf-class support tankers
One of the outcomes of the 1956 Commonwealth Prime Ministers' Conference saw the Admiralty plan to improve its ability to re-supply at sea by developing a group of ships to meet their latest requirements.

Seven tankers were bareboat chartered between 1959 and 1960. Six were initially used as freighting tankers and one was used as a replenishment tanker. An eighth tanker was later acquired in 1973, and this took on the same name and pennant number as one of the initial seven, Cherryleaf A82.

These eight vessels were all comparable to each other and were essentially bare-boat chartered as replacements for the Dale-class and Wave-class oilers.

Third Leaf-class support tankers
The Ministry of Defence (MoD) delared its intention to charter two laid up tankers in October 1978. They were from a four ship order by John Hudson Fuel & Shipping Ltd, at the former Cammell Laird Shipbuilders Ltd yard at Birkenhead.

Due to financial difficulties the new owners were unable to accept any ships, this occurring after three had already been laid down. Eventually the builders took over the ships and they were put up for sale or charter. The fourth ship was built later on.

A fifth vessel was later chartered, but this had been built for a Swedish company at Uddevalla, and was much different from the other four Cammell Laird builds.

Second Leaf class
Appleleaf was launched as George Lyras by the Wearside shipbuilders Bartram & Sons in September 1955 and took on by the Royal Fleet Auxiliary in April 1959. Bayleaf, Brambleleaf and Orangeleaf were all constructed by the Furness Shipbuilding Company of Stockton on Tees. Brambleleaf was laid down in May 1952 and Bayleaf in September 1953, with both vessels built for London & Overseas Freighters Ltd as London Loyalty and London Integrity respectively. Brambleleaf was taken on by the RFA in May 1959 and Bayleaf in June 1959. Orangeleaf was laid down in November 1953, built for The South Georgia Co Ltd as Southern Satellite and its RFA charter started in May 1959.

The initial Cherryleaf was finished for Molasses & General Transport Co Ltd in 1953, as Laurelwood by James Laing & Sons. Her RFA charter began in 1959 and finished in 1965. The second Cherryleaf started life as Overseas Adventurer for London & Overseas Bulk Carriers Ltd, built in 1963 by Rheinstahl Nordseewerke, Emden. Her RFA charter began in March 1973. Pairleaf was purchased by Jacobs & Partners Ltd before her launch with the RFA charter in mind and started in 1960. Plumleaf was built for Wm Cory & Son Ltd, London, as Corheath, by Blyth Shipbuilding Company, however, her charter was agreed early and she ran trials as Plumleaf before entering RFA service in 1960.

Third Leaf class
Appleleaf was launched as Hudson Cavalier was took on by the Royal Fleet Auxiliary in February 1979, following conversion work the previous year. Brambleleaf was launched as Hudson Deep, following a refit she entered RFA service in March 1982. Orangeleaf was launched as Hudson Progress, but was sold and became Balder London. She moved aviation fuel from Ascension Island to the Falkland Islands in 1982 and after a refit entered service with the RFA in 1984. Bayleaf was laid down as Hudson Sound but was completed as Bayleaf and entered RFA service in March 1982. Oakleaf was built as Oktania at Uddevalla, Sweden and entered service with the RFA in August 1986.