From 'Fedden - the life of Sir Roy Fedden' by Bill Gunston (p.274):
'Both [A-26 and B-29] bombers might have been improved by being fitted with the more powerful Centaurus engine, and the [1943 Fedden Report of the Misssion to the USA] did make a firm recommendation that examination should be given to the manufacture in Britain of a Centaurus B-29, if necessary without pressurisation and with simple direct-control gun turrets.'
Which Saber?