An English authority on dictionaries, James Root Hulbert, says that The Concise Oxford is the best for literary use in Britain and Chambers the best  for general British use. 
( ( ( An ( English authority ) ) ( on ( ( ( dictionaries , ) ( James ( Root Hulbert ) ) ) , ) ) ) ( ( says ( that ( ( ( ( The ( Concise Oxford ) ) ( is ( ( the best ) ( for ( ( literary use ) ( in Britain ) ) ) ) ) ) and ) ( Chambers ( ( the best ) ( for ( general ( British use ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT An) (JJ English) (NN authority)) (PP (IN on) (NP (NP (NNS dictionaries)) (, ,) (NP (NNP James) (NNP Root) (NNP Hulbert)) (, ,)))) (VP (VBZ says) (SBAR (IN that) (S (S (NP (DT The) (NNP Concise) (NNP Oxford)) (VP (VBZ is) (NP (NP (DT the) (JJS best)) (PP (IN for) (NP (NP (JJ literary) (NN use)) (PP (IN in) (NP (NNP Britain)))))))) (CC and) (S (NP (NNP Chambers)) (NP (NP (DT the) (JJS best)) (PP (IN for) (NP (JJ general) (JJ British) (NN use)))))))) (. .)))
James Root Hilbert says The Concise Oxford is the best for literary British use. 
( ( James ( Root Hilbert ) ) ( ( says ( ( The ( Concise Oxford ) ) ( is ( ( the best ) ( for ( literary ( British use ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP James) (NNP Root) (NNP Hilbert)) (VP (VBZ says) (SBAR (S (NP (DT The) (NNP Concise) (NNP Oxford)) (VP (VBZ is) (NP (NP (DT the) (JJS best)) (PP (IN for) (NP (JJ literary) (JJ British) (NN use)))))))) (. .)))