Gowers, himself an Englishman, said that  in Scotland, its land of origin, the pronunciation is skawn , and English people who know this so pronounce it. 
( Gowers ( , ( ( himself ( an Englishman ) ) ( , ( ( said ( ( ( ( ( ( ( that ( in Scotland ) ) , ) ( ( its land ) ( of origin ) ) ) ( , ( ( the pronunciation ) ( is skawn ) ) ) ) , ) and ) ( ( English people ) ( who ( know ( this ( so ( pronounce it ) ) ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (NP (NNS Gowers)) (, ,) (S (NP (PRP himself)) (NP (DT an) (NNP Englishman))) (, ,) (VP (VBD said) (NP (NP (NP (DT that)) (PP (IN in) (NP (NNP Scotland)))) (, ,) (NP (NP (PRP$ its) (NN land)) (PP (IN of) (NP (NN origin)))) (PRN (, ,) (S (NP (DT the) (NN pronunciation)) (VP (VBZ is) (ADJP (JJ skawn))))) (, ,) (CC and) (NP (NP (JJ English) (NNS people)) (SBAR (WHNP (WP who)) (S (VP (VBP know) (S (NP (DT this)) (RB so) (VP (VB pronounce) (NP (PRP it)))))))))) (. .)))
Gowers said that some English people use the correct Scottish pronunciation.
( Gowers ( ( said ( that ( ( some ( English people ) ) ( use ( the ( correct ( Scottish pronunciation ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Gowers)) (VP (VBD said) (SBAR (IN that) (S (NP (DT some) (JJ English) (NNS people)) (VP (VBP use) (NP (DT the) (JJ correct) (JJ Scottish) (NN pronunciation)))))) (. .)))