The twin screw Liverpool's were introduced in 1945 as a more powerful version of the single screwed lifeboats. The first one, 'Cecil Paine' entered service at Wells in 1945. The only difference between the two types of Liverpool class lifeboat is that the twin screw has a slightly different windscreen and of course is powered by two engines instead of one. Apart from that there are only minor differences that you would have to look very close to notice.

 

 Earlier built Liverpool class lifeboats were originally powered by twin 18 horsepower Weyburn AE4 petrol engines, but were later re-engined with twin 32 horsepower Parson Penguin diesel engines as the Weyburn engines weren't as reliable or efficient. Later examples of the Liverpool class lifeboat were powered by F.K.R twin diesel engines, meaning they didn't have to be re-engined later in life.

 

 The last Liverpool to be built, 'Grace Darling', was built in 1954 and was the last of the Liverpool class motor lifeboats to be built. The last Liverpool class lifeboat to be taken out of service was 'Chieftain' the Barmouth lifeboat, which was taken out of service in 1982, being replaced by a 37 foot Rother class lifeboat. Unlike nearly every other Liverpool class lifeboat, 'Chieftain' was launched from a slipway.

 

 Below is an uncompleted list of twin screw Liverpool class lifeboats, if anyone can help me fill in any details or missing lifeboats you are more than welcome to.