Pages 148-151 of the MAR section of the WW1 Service Records (WO 363) are supposedly for a JOHN MARSHALL of Liverpool. The last 2 pages, however, give genealogical info that is not recorded as MARSHALL in freebmd - the surname is SHAW.
My guess is that these 2 pages are mis-files ... but the date of enlistment (8 August 1908) is IDENTICAL. A bit too much of a coincidence? Perhaps SHAW served as MARSHALL?

The man married Bridget MCCARTHY in Queenstown, Co Cork, on 19 June 1910.
Children: Christina May 1910 (Fermoy); Esther Mary 1913 (Warrington); John William 1915 (W Derby).

The man declares 2 brothers: JIM & RUPERT, 1 sister: ALICE.

IF they are the same man, he declared age 17y 11m born in MANCHESTER (b c1890?).

Anc****y, MAR, pages 150-151