Perhaps I could chip in.

There is an Eric Frank Parsloe born in Q4 1897 in the Newport, Mon Registration District, which is consistent with Eric Frank Tovey`s birth date of 21 September 1897.

From the Glos BDMs there is also a Violet Magdalen Eleanor PARSLOE born in 1895 at Gloucester, South Hamlet.

Both seem to fit what you know, but needs more research.