I think he means the British East Indies Fleet under Somerville. Its strength varied, as it gained and lost carriers to the Mediterranean, but it was not an insignificant force. In OTL Nimitz went so far as to make enquiries about redeploying some of their ships to the Central Pacific as part of the pre-Midway buildup.
Yeah, for about three months in 1942 the Eastern Fleet had Illustrious, Formidable, and Indomitable along with attendant escorts.